Topographic Drawings by E. Hergesheimer, Assistant.

These 1:10,000 Scale drawings are reference and example drawings showing the proposed techniques and styles for what would become the standards of topographic mapping and cartography. Contour lines were still uncommon on maps of the day.
Examples include:
Heavy Oak Woods, Reclaimed Marsh and Orchards (Delaware River)
Railroads, Canals, Iron Bridges, Rocky-cliffs, Mid-river drift, Water-worn Rocks, Mixed Woods overhill curves (Harper's Ferry)
Rice, Dykes, and Ditches (Santee River)
Eroded drift banks, with boulders, set free; and scrub deciduous woods (Gay Head)
Sand Beach with Low Dunes, Fresh Water Pond, Meadow Grass, Sage Brush and Arroyos (S. Coast California)
Sand and Shingle Beaches, Eroded Earth Banks, Roads, Fences, Dwelling and Out-Houses, Shaded Road-sides, Hill-shading (Nahant)
Blocking of Cities, Large Buildings, Suburban Villas and Grounds, Fresh Marsh (Newport R.I.)
Sparsely settled Town, Salt Marsh, Pine Woods, Ditches, Fences, and Undefined Roads (Brunswick, Ga.)

IMPORTANT NOTE:

All of our United States Coast Survey (USCS), United States Coast & Geodetic Survey (USC&GS), and similar maps and charts have been professionally unfolded and flattened using humidity baths, semi-permeable membrane, and drying blotter techniques. Most others you typically see on eBay have not been, and worse, are quickly and crudely unfolded for the low-quality photos you see. Unfolding these maps in that way is damaging and weakens them. Please be aware.