But documents and descriptions are not enough for the thorough study of any subject which concerns tangible objects, and three famous collections were inspected for first hand information upon the stamps themselves. To Mr. Charles Lathrop Pack of Lakewood, N. J., Mr. George H. Worthington of Cleveland, Ohio, and the lamented Mr. John F. Seybold, late of Syracuse, N. Y., are due not only the author's fullest thanks for opportunities freely given to examine their magnificent collections of Canada, but the debt extends to philatelists in general for thus being enabled to share, through study, description, listing and pictorial reproduction, in the results of their specializing. Mr. Pack's wonderful array of rarities, beautiful copies and remarkable series of shades has been largely used in the compilation of the stamp lists. This collection though since much enlarged and improved, obtained the gold medal at the International Philatelic Exhibition in London, 1906. Mr. Worthington's fine collection has also been used in the same way and has furnished much information concerning plate numbers and marginal imprints. Mr. Seybold's covers were particularly interesting in showing the actual use of the stamps, the cancellations employed, and various other features to be gleaned from the study of original covers, particularly of early date. Selections for illustrative purposes were made from all three collections, as will be noted. Mr. John N. Morse and Mr. Edwin F. Sawyer, both of Boston, have very kindly placed their collections of post cards and envelopes, respectively, at our disposal for purposes of study. Again, the philatelic press has been diligently searched for articles, stray notes, etc., which would illumine the pathway, particularly by throwing side lights on various phases of the subject. Prominent among these were the articles on Canada by Messrs. C. B. Corwin, D. A. King and J. R. Hooper in the _Metropolitan Philatelist_ for 1890-91, and by Mr. Donald A. King in Stanley Gibbons' _Monthly Journal_ for 1896-97.