Gallery›Library of Congress — Maps›Survey of the rocks in the Potomac River above Georgetown known as the "Three Sisters" : showing the surveys of Wm. Deakins and John Threlkeld, pattented to J. Hoy & Wm. D. Cassin, also the pattent of John Moore
Survey of the rocks in the Potomac River above Georgetown known as the "Three Sisters" : showing the surveys of Wm. Deakins and John Threlkeld, pattented to J. Hoy & Wm. D. Cassin, also the pattent of John Moore
Library of Congress — Maps

Survey of the rocks in the Potomac River above Georgetown known as the "Three Sisters" : showing the surveys of Wm. Deakins and John Threlkeld, pattented to J. Hoy & Wm. D. Cassin, also the pattent of John Moore

brewer, h. w. · 1893

Map
CC0 — Public Domain
Library of Congress — Maps
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