In conclusion I desire to express to Messrs. J. M. Bartels, Edward H. Mason and Geo. Rauh, all of Boston, my sincere thanks for the valuable aid which they have rendered me in preparing this work.
Mr. Bartels has worked with me continuously in my investigations into the intricacies of these dies; Mr. Mason has placed his grand collection of United States envelopes unreservedly at my disposal, besides aiding me in many other ways, and it is to Mr. Rauh that I am indebted for the very fine and conscientiously executed drawings of the various, heads of this series.
VICTOR M. BERTHOLD.
Boston, Mass.
Feb. 1905.
FOOTNOTES:
[A] The—Nesbitt Stamped Envelopes—and Wrappers—of the—United States of America,—with descriptions of the varieties of the dies,—and fifteen full-page illustrations—by—the late Gilbert Harrison.—Edited and completed—by—E. D. Bacon.—Published as a supplement to the "London Philatelist",—by M. P. Castle,—Vice-President of the Philatelic Society, London,—1895.
[B] The—Stamped Envelopes.—Wrappers and Sheets—of the United States—by John K. Tiffany, R. R. Bogert,—and Joseph Rechert.—A Committee of the National Philatelical Society,—New York—1892.—Published by—The Scott Stamp & Coin Co. Limited.—12 East 23rd St.