CSA #11, 10¢ blue top left sheet margin copy tied neat clear violet AUGUSTA / Ga. MAR / 4 [1865] CDS on cover to “Capt. J. C. Wrenshall, Macon, Georgia”, stellar stamp and scarce beautifully struck color cancel only used late in the war, cover reduced slightly irregularly at left. Docketing at left as from Mrs. Geo Yonge. Wrenshall was married to Letitia Yonge. The addressee was a staff officer in the Engineer Corps.  J. C. Wrenshall was one of the three engineers noted as founding members of the Baltimore Chapter, American Institute of Architects, 1870-71. $300.