This finely lithographed map is from A Spanish Survey in 1868 with additions from a Survey by the U.S. C. & G. Survey in 1899, published with corrections to Sept., 1900. The chart is centered on the San Juan Harbor with the streets of San Juan named. Filled with information and details, it locates the jail, railroads, powder magazine, tramway, hundreds of soundings, hazards, buoys, lighthouses, forts, submarine telegraph cables, individual buildings, and more. A notation in the upper part of the map says that a black ball raised on the gaff predicts the "probable approach of a storm." Red overprinting shows the locations of Naval property. An uncommon chart.

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Condition: A+

Folding as issued with full margins. Lovely example with a narrow strip of archival tape on verso of one fold, still fine.