subject
post roads: explore 1 source-linked works published from 1839 to 1839, with original documents and citations.
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Includes records with this source-supplied label or an explicit phrase match in their metadata. Matches indicate a mention, not proof that a paper uses a method or tests a material. Source versions are consolidated by DOI.
Sources: loc. Collection updated 2026-09-20. Counts describe this index, not the complete source archives.
Detailed map showing relief by hachures, drainage, township and county boundaries, cities and towns, canals, roads, and railroads. [From published bibliography]