4pp, illus, card covers tied with cord, 11x9". Published in 1953 on the 50th anniversary of the first powered flight. Interior two pages show the mural in color on one page and the facing page has a numbered map identifying all the aviators and aircraft pictured. This mural was commissioned by Clarence deGriers in 1940 and resided in Liquidometer headquarters until 1955 at which time it was donated from place-to-place, eventually ending up at the Indiana Historical Society whre it is apparently being restored. The artist, Justin Gruelle, is a well-known Indiana artist who was well known for his WPA work in the 1930's. Brochure is very good; one small corner bump.