DLO Ottawa, pair of covers with #2-DLO1 "Dead Letter Branch Ottawa Canada 2 ring (AM MY 31 15) Earliest recorded date as bs on 1915 cover with 1¢(2) Admiral, second cover #2-DLO1 bs (AM AP 12 19) as Jim Miller's Latest Reported Date on 1918 Nanaimo cover to soldier, Seaforth, England with Canadian PO Seaforth Sussex bs as well, (Image)