1892-1938 Nine Printed DLO envelopes and forms incl. 1892 use of #10 returned dead letter envelope D. 201/2-5,000-31-7-'91, 1894 use of envelope D.6-25,000-24-1-94; 1895 use of envelope D.19-20,000-26-10-'94., 1900 use of envelope 6 D.L.(a) 50,000-27-7-99; 1901 Toronto rimless duplex on envelope 10 D.L(a)-30,000-8-1-1901.; 1915 use of envelope 6.D.L.(a)-65,000-17-4-14.' 1919 use for form letter 16.D.L.(a)-5,000-23-4-19.; 1937 use and 1938 use of 5 D-200,000-11-9-35. (Image)