A Topographical Chart of the Bay of Narraganset in the Province of New England. (1777)

Holla, holla.

Star map of the Southern Hemisphere.

Happy Evacuation Day!
Following the arrival & emplacement of artillery liberated from Fort Ticonderoga, the Siege of Boston was lifted when occupying British forces evacuated the city on March 17, 1776. (Which just happens to coincide with another big event in Boston…)

Sketch of British and American Lines and Fortifications in Boston Area by John Trumbull, 1775

More details via the National Archives at Boston on Facebook »

“Geological Investigation of the Alluvial Valley of the Lower Mississippi River” by Harold Fisk, 1944. (via The Rocks Know)