(Maryland) Pleasant Grove Md. Aleg'y Co. Jun. 21 Free Post Office Stamps Made Here. Well-struck double-circle datestamp on cover to Salem N.C. with "E. N. Zevely P.M." Free frank, included are original contents which states in part…"I am almost oppressively overcome with orders -- work work work -- & still the mountain before me increases -- but gold lies beyond? & don't I need some?, backflap with fancy red Masonic handstamp (reattached), fresh and Very Fine, a lovely example of one the most celebrated 19th century fancy postmarks. Estimate  $500 - 750. $0 (Image)