William R. Ricketts, Philatelic Literature Bibliography. Original complete 401 page typewritten copy of
"Philatelic Literature Bibliography Index" by William R. Ricketts, with letter dated March 1, 1912 describing the index and the planned release of 10-15 pages at a time, nice condition, according to the Smithsonian National Postal Museum's website, only three complete copies of this privately published index are recorded (this one is probably not included in that total), this comes from the massive Atkins collection of philatelic literature, much of which was donated to the APRL
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E. 400-500