Pensacola/Nov. 6. Two-line date stamp (type IIIa) and manuscript "Free" frank on 1821 folded letter from Col. Brooke to General Jesup in Washington D.C.; file folds, Very Fine, the earliest known example of the Pensacola type IIIa postmark, a rare pre-territorial usage during American Military Government Period with only 14 examples known. Estimate  $500 - 750. $0 (Image)