(Multnomah) Portland, O.T./Jan. 24, 1859. Cds (Whittlesey #4, R B) on stained cover to London with manuscript pencil "58" paying the double West Coast rate, endorsed with forwarding instructions to Ireland if not found in London, backstamped with London arrival & rare "Art-5/Br. Pkt." handstamp (The ART-5 marks were used to indicate post office exchange accounting between the USA and Great Britain under the Anglo-American postal treaty of 1849.), reduced at top with part of flap torn away, Fine, a scarce postmark as this is only known in the Territorial period from Nov 22, 1858 - Feb. 13, 1859. Estimate  $200 - 300. $0 (Image)