1864 (Nov. 24) Hawick, Scotland to Morley, N.Y. via Portland Packet, mourning cover from bearing 1862, 4d vermilion, pair and single, tied by Hawick (11.24) duplexes, carried by Allan Line St. David from Londonderry Nov. 25 to Portland arriving Dec. 20, red "Portland Me Am. Pkt. 'Paid' Dec 20" exchange cds, partial "21 Cents" G.B. credit to U.S.; couple perf flaws, Very Fine, a scarce Portland packet use, one of only four recorded examples of this "21 Cents" marking. Scott No. GB #34  Estimate $200 - 300. "St. David" broke her screw on December 14 off Cape Race and was towed into Portland by the Allan Line steamer "Damascus". The red circular 21/CENTS marking is a mystery as it doesn’t appear in the British rate impression books nor in any published literature of markings. While it may seem appropriate to be a Liverpool marking, as they were required to mark the credit, it may ultimately turn out to be a Portland marking. $0 (Image)