Includes:
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Letter from the Secretary of War... relative to the expediency of preserving Goat Island for military purposes. 15 pp. Senate Ex. Doc. 23, 42d Congress, 3d Session. 1873.
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Letter from the Secretary of War, in relation to the bill to quiet the title to Yerba Buena Island. 27 pp. Folding chart. 1881. Together, to items. Disbound from larger volumes.
The idea of a military post on Yerba Buena Island originated during the Civil War, when it was feared a raiding Confederate warship could slip past Fort Point and Alcatraz during a foggy night. The charts show the island, planned and built defenses, arc of fire, the S.F. Bay, etc. The 5 folding maps & plans that were issued with the first document are not present.