two large boxes with about 5,000 covers, occasionally accompanied by complete stamp series stashed inside the envelopes with minimal duplication, it would be easier to list the countries that are not here, it is that diverse, in addition are collateral autographs, cachets galore, parallel perf and imperfs errors on some series, different markings covering virtually every aspect of rocket mail, as well as useful balloon post, mostly F-VF, outstanding retail potential. 

An impressive collection housed in 4 albums, accompanied by collateral and literature, about 350 covers with some of the better items noticed include a very diverse range of Zeppelins, Special Flights, Contract Routes, First Flights, Trans-Polar, some unusual and interesting flights or uses including unusual bisect on  U.S. #C10 on cover with the remark "no 5cts airmail stamps available" etc. Also some of the foreign in all of the books include, Cuba Rocket mail and Cuba Skytrain, Germany Zeppelin, various Canada including covers delayed due to the St Lawrence river freezing over, service suspended to France at the outbreak of WWI, GB high values defins on cover, India, Australia combined with Australian Antarctic Territory, South Africa etc, various Canal Zone, as well as South Africa covers etc etc. generally F-VF, a real treasure trove for the traditional or on-line retailer.