cover Liberty & U.S. Patent Office, Magnus multicolor allegory and view (Walcott #656) on patriotic cover to N.Y., franked with faulty 3c Rose (65), tied by 'Washington D.C. Dec 17, 1861' c.d.s., with original contents - an illustrated patriotic lettersheet in purple headed Camp Palmer which relates being on patrol and taking three deserters prisoner, small pox and measels in the camp, etc., overall soiling and couple tape mends, otherwise fine, scarce design