- Sketch of Fort Pickens, by Lieutenant Langdon - Santa Rosa Island, Florida
- Photograph of an illustration.
- The sketch was made possibly by Loomis L. Langdon (later a colonel in the Union Army); it is dated May 27, 1861. Colonel Langdon later studied painting at the National Portrait Gallery in London.
- 1 photonegative - b&w - 4 x 5 in.
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