(Canada Cross-Border Steamboat Mail) 1870 (Jul. 27) Portland Me. to Acadia Mines, Nova Scotia, cover bearing 1869, 6¢ ultramarine tied by cork cancel duplexed with "Portland Me. Jul 27" cds, endorsed "pr Steam Mail via St. John N.B.", reverse with St. Johns (7.29.1870) and New Glasgow (7.30) transits; reduced slightly at right, minor filing holes, Very Fine. Scott No. 115  Estimate $200 - 300. $0 (Image)