Cape Smyth, Alaska, Sept 6, 1899, dateline on lengthy original enclosure to Prattsville, N.Y., cover endorsed "Ship's Letter" with straight line "Ship 4" straight line handstamp and 2¢ Postage Due pair tied by handstamps, reverse with San Francisco transit and receiving postmarks, letter mentions sending letter by way of Herschell Island; some edge wear, Very Fine. Estimate  $300 - 400. $0 (Image)