Washington, National Geographic Society, 1928.
Quarto, two volumes, 742 and 766 pages with hundreds of illustrations (almost all from photographs, some in colour; and more than a few from the air) plus three folding colour plates (after artwork by N.C. Wyeth) in an end-band.
Original publisher's post-binders (heavily blind-embossed and gilt-decorated brown cloth) a little rubbed at the extremities; each volume contains six issues, bound in without the original wrappers; the contents of Volume 54 are inserted upside down (a mistake easily rectified); edges lightly foxed; mild signs of handling; an excellent pair.
These twelve issues contain a number of important lengthy articles by (or about) famous early aviators: Lindbergh (two), Cobham, de Pinedo, and Kingsford-Smith and Ulm. The main article in the December issue, 'Renascent Germany' (pages 639-717), makes very interesting reading.