Cite evidence from primary and secondary sources using their date and origin, summarize how ideas develop, and decide whether earlier events caused later ones

Learning goal: Cite specific textual evidence to support analysis of primary and secondary sources, attending to features such as the date and origin of the information; determine the central ideas or information of each source; provide an accurate and objective summary of how key events or ideas develop over the course of a text; and analyze in detail a series of events, deciding whether earlier events caused later ones or simply preceded them.

What is real and what is invented. The general setting of this lesson is real. In late March 1913, beginning on Easter Sunday, 23 March, several days of very heavy rain fell across Ohio and neighboring states, and rivers throughout the state flooded; Dayton, on the Great Miami River, was among the worst-hit cities. Afterward, Ohio passed a Conservancy Act (February 1914), and under it the Miami Conservancy District was organized in 1915; it built a flood-protection system of five dry dams together with levees and improved river channels. Everything else here is invented for instruction. Harmon Falls is not a real town, the Tamber River does not exist, and Clara Whitlock, Walter Pruitt and the historian R. M. Ashby are fictional. Every number in these sources belongs to the fiction. Use the sources to practice reading; never quote them as facts about Ohio.

Original fictional primary source A — Diary of Clara Whitlock, schoolteacher, Harmon Falls, Ohio (invented for this lesson).

Tuesday, 25 March 1913. Rain since Sunday without a pause. School closed at noon because the Front Street children could not get home by the ford. Father says the Tamber is higher than he has seen it in thirty years. At supper we heard the fire bell and saw lanterns moving on the railroad fill below the Mill Ward. Men are saying water is piling up against the embankment on the upstream side, because the one culvert under it is choked with drift.

Wednesday, 26 March. At about two in the morning there was a roar like a train, though no train was running. The fill gave way near the culvert and the water that had been held behind it came through all at once. By daylight the Lower Ward was a lake, water to the second-floor windows on Front Street. From our porch on Cemetery Hill I counted eleven rowboats working. Mr. Pruitt's boy was brought up to the schoolhouse, which is now a shelter, soaked and silent. I do not know how many are lost. People say forty; people say none. I will write only what I see.

Saturday, 29 March. The water is down. The Relief Committee met in the schoolhouse and asked me to keep the register of families. The mud in the Lower Ward is a foot deep in the houses. Several men blamed the railroad fill, and one shouted that the new mayor had done nothing, though he has been in office only since January and was rowing a boat himself on Wednesday.

Original fictional primary source B — Walter Pruitt, recorded interview, 1963 (invented for this lesson). Walter Pruitt was twelve in 1913; this is part of an interview recorded for a county anniversary project fifty years later.

"What I remember is the sound. People said it was the dam breaking, but there wasn't any dam, it was the railroad bank. We lived on Front Street, and my father put me out the upstairs window into a boat. I was taken up to the school. I remember the teacher gave me dry socks that were too big. Later on everybody said the railroad had caused the whole flood. Well, it rained for three days, and the river would have come up anyhow. But I always believed that if the bank hadn't held the water back and then let it go all at once, we'd have had time to get the furniture upstairs."

Original fictional secondary source C — R. M. Ashby, "Water and Blame in a River Town," an essay in a county historical journal, 1988 (invented for this lesson).

The flood of March 1913 is remembered in Harmon Falls as a single night, but the town's losses were built over the previous four years. In 1909 the railroad company raised a fill across the river bottom east of the Mill Ward, carrying its track above ordinary high water and leaving a single culvert for the Tamber's overflow. Residents of the Lower Ward complained to the council in 1910 that the fill "dammed the bottom," but no action followed. When the rains of March 1913 filled the river, drift choked the culvert, water ponded behind the fill, and in the early hours of 26 March the fill failed, releasing a surge into the Lower Ward.

Harmon Falls also had a new mayor, who took office in January 1913 after his predecessor resigned. Some residents afterward blamed him for the disaster. The record gives little support to that charge: he took office less than three months before the flood, the fill had been built and the complaint ignored under his predecessor, and contemporary accounts place him in a rescue boat. The flood's toll fell overwhelmingly on the Lower Ward, the town's poorest district, a pattern that the Relief Committee's own register makes plain.

Date and origin: why they matter. A source's date is when it was made; its origin is who made it, where, how and for whom. These features are not decoration on a citation. They tell you what the author could know. Clara writes each entry on the day it describes, from a porch on Cemetery Hill, so she can report what she sees but not what happened on Front Street unless someone told her; she marks rumor herself ("People say forty; people say none"). Walter's interview is a primary source, because he witnessed the night, but its date matters: it was recorded fifty years later, after half a century in which he could hear the town's explanations. His memory of the sound and the dry socks is vivid and personal; his judgment that "everybody said the railroad had caused the whole flood" is shaped by the years between. The historian's essay is a secondary source written in 1988 by someone who witnessed nothing and who can combine many records, including the 1910 council complaint that neither Clara nor Walter mentions.

Citing specific textual evidence. An analysis is a claim about what a source shows; evidence is the precise words that support the claim, with the source identified and, when it matters, its date and origin. Weak: "The diary says the fill broke." Strong: "Clara, writing on 26 March 1913, the same day, records 'a roar like a train' at 'about two in the morning' and states that 'the fill gave way near the culvert'; because she is on Cemetery Hill, she is reporting what she heard and later saw from a distance, not what she watched at the culvert." The strong version quotes, dates, locates the witness, and says what the evidence can bear.

Central ideas and an objective summary. The central idea is what a text's details add up to. In Clara's diary it is that the flood came suddenly when the railroad fill failed, and that within days the town began arguing about blame, while she records the rumored numbers only as rumor and refuses to accept either as fact. In Ashby's essay the central idea is stated: the losses of the one night had causes built over the four years before it, and the blame directed at the mayor does not fit the record. An accurate and objective summary traces how key events or ideas develop over the course of the text, usually most clearly in the text's own order (a summary may reorder if it still shows the development accurately), with no opinion added. For Ashby: the essay moves from the 1909 fill, to the 1910 complaint, to the chain of rain, drift, ponding and failure, then turns to the mayor and tests the charge against dates, and closes on who suffered most. "Ashby proves the railroad was evil" is neither accurate (he makes no moral judgment) nor objective (it adds the summarizer's feeling).

Caused or simply preceded. A series of events in a text is a sequence in time. Some links in it are causal; others are only chronological. An earlier event is supported as a cause of a later one when there is a mechanism connecting them (a way the first produced the second), the evidence shows that mechanism operating, and other explanations of the later event have been weighed. A mechanism can also make an event a contributing cause, one of several, rather than the whole cause. An event that merely came first is not a cause because of its position; that error is called reasoning "after this, therefore because of this." Consider the mayor. His arrival in office in January 1913 preceded the flood. Did it cause any of the losses? A mechanism would be something he did or failed to do in office. Ashby checks: the fill and the ignored complaint belong to his predecessor, and he held office under three months. On this record, his taking office simply preceded the flood: the sources name no mechanism, although they cannot rule out every possible failure on his part. Now the fill. It was built in 1909, long before 1913, yet the texts describe a mechanism: one culvert, drift choking it, water ponding behind the fill, failure, sudden surge. Clara recorded men saying that water was "piling up against the embankment"; Walter's view in 1963 is that without the bank "we'd have had time." The rain is the other explanation to weigh, and the sources separate the two: the rain explains the river's rise, which Walter rightly says "would have come up anyhow," while the fill explains how the water arrived. The fill is therefore a plausible contributing cause of the suddenness of the flooding and of the lost time, though not of the rain or of the river's rise.

A fully worked model. Claim: the sources support calling the railroad fill a cause of the surge, but not a cause of the rain or of the river's rise. Evidence: Clara (25 March) records that men were saying water was "piling up" upstream of the choked culvert and (26 March) that "the fill gave way... and the water that had been held behind it came through all at once"; Ashby describes the same sequence and adds the 1910 complaint. Walter, fifty years later, grants that "it rained for three days, and the river would have come up anyhow." Reasoning: the diary gives a same-day, same-town account of the mechanism, part of it reported from what men were saying and part heard and seen by Clara herself; the essay supplies earlier evidence the diarist did not have; the interview, though late, separates the rising river from the sudden surge. Limit: none of these sources measured how high the water would have risen without the fill.

A misconception. Students often treat the most recent or most confident source as the most reliable. Date and origin cut both ways: the 1988 essay can see the whole sequence from 1909 to 1913, but it depends on the records it chose; the 1913 diary is close to the event, but its author could see only from her porch.

Worked citation using date and origin: Claim: the story that forty people drowned was circulating in Harmon Falls, but the diary is not evidence that forty died. Evidence: Clara writes on 26 March 1913, "People say forty; people say none. I will write only what I see." Reasoning: the date shows this was written on the day of the surge, when Clara herself did not know the toll ("I do not know how many are lost") and reports no count made by anyone; her phrase "people say" marks the numbers as rumor, and her next sentence tells us she deliberately refused to adopt either one. A report that cited the diary for a death toll would be misusing a source whose author warned against exactly that use.

Worked objective summary of development: A student's summary of Ashby reads, "The railroad dammed the river and caused the flood, and people unfairly hated the mayor." Test each part. Ashby says the fill "dammed the bottom" only as a quotation from the 1910 complaint; his own account says rain filled the river and the fill failed, releasing a surge, so "caused the flood" overstates him. "Hated" adds emotion not in the text. Revised: "Ashby traces Harmon Falls's 1913 losses to a four-year sequence: the railroad's 1909 fill with one culvert, an ignored 1910 complaint, and the fill's failure on 26 March 1913, which sent a surge into the Lower Ward. He then tests the later charge against the new mayor, finds the dates do not support it, and ends by noting that the poorest district suffered most." The revision follows the essay's order and adds no opinion.

Worked cause-or-precede analysis: Sequence from the sources: (1) 1909 fill built with one culvert; (2) 1910 complaint ignored; (3) January 1913 new mayor takes office; (4) 23–25 March 1913 continuous rain; (5) night of 25 March, culvert choked, water ponds behind fill; (6) about 2 a.m. on 26 March, fill fails; (7) Lower Ward flooded to second floors; (8) 29 March Relief Committee meets and begins its register. Test each link for a mechanism. 4 → 5: rain raised the river and carried the drift, a direct mechanism. 1 → 5: the fill held the water only because it crossed the bottom with a single opening, so it is a cause of the ponding. 5 → 6 → 7: failure released the stored water all at once, a mechanism both witnesses describe. 3 → 7: no mechanism is named in any source and the mayor had no part in steps 1 or 2, so, on this record, the change of mayor simply preceded the flood. 2 → 7 is a causal condition, not a direct cause: ignoring the complaint left the fill unchanged. 7 → 8 is causal: the committee met and began registering families because of the flood. Only the change of mayor falls out as mere sequence.

Evidence log (representation): Build a four-column log for the three Harmon Falls sources: the claim; the exact words quoted; the source's date and origin (who, when, where, how); and what that date and origin allow or prevent the source from showing. Enter at least six rows, two from each source, including one row in which a source is used for something it cannot show and then corrected. Then draw the events of the lesson as a numbered sequence and mark every link with either an arrow labeled with its mechanism (caused) or a dotted line labeled "preceded only".

Independent performance: Write an analysis of 350 to 450 words answering: What caused the Lower Ward's losses in March 1913, according to these sources, and how far can each source be trusted on that question? Success criteria: (1) at least four quoted pieces of evidence, each cited with the source's date and origin; (2) one accurate and objective summary sentence for each source that traces how the text develops and adds no opinion; (3) the central idea of the diary and of the essay stated in your own words; (4) at least one earlier event shown to be a cause, with its mechanism named, and at least one shown to have simply preceded the flood, with the reason; (5) one limit of the 1963 interview that comes from its date; (6) the sources described as invented for this lesson.