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The Sanborn Test: Run, and Positive — 1909, 1917, 1929

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test run November 2026 · Indiana State Library microfilm

Fire-insurance mapping covers North Liberty in three editions — 1909, 1917, and 1929 — settled by two independent carriers agreeing, with the maps themselves on state-library film and at least one edition digitized at the Library of Congress. The test was run as the baseline's discipline requires — coverage tested, not assumed. The Commercial nomination's source list, read whole in the preceding article, independently cites the same three editions — two carriers, one answer. Which edition the federal copy carries banks as a named gap (G-SB-1), its settler the item's own title and metadata page. The maps' working value to this build is already visible: the nomination read the Herald's office and printing plant at 139 North Main Street off the 1909 and 1917 sheets, and the same sheets are the named settlers for the 1868 high-school building's site and fate in the schools leg — a building's footprint on a fire map being exactly the kind of fact a small town's record otherwise loses. Sheet counts and street-by-street coverage are not stated by any carrier read and are not invented here; the film at the state library is the pull, and it stands in this section's pull list.

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Source: The Sanborn Test: Run, and Positive — 1909, 1917, 1929, Moosed History by Project Moosed, https://history.projectmoosed.com/usa/midwest/indiana/north-liberty/sources/sanborn-test-run-and-positive-1909-1917-1929/