Flooded areas: Allegheny River, Great Creek and Little Valley Creek, Salamanca, New York.

Scale ca. 1:32,000.

A plan of the county of Fairfax on Potomack River the middle of which is in 39⁰, 12ʹ No. latitude.

Also covers Arlington and Loudoun counties.

[A survey of a plot in Lancaster and Northumberland counties bounded by the Chesapeake Bay, Rappahnnock River, and the Potomac River ] /

Relief shown by hachures.