This collection is comprised of several types of items, including correspondence (letters, memos and telegrams covering the years 1932-1955), flight school and pilot training materials, and flight log books for Mabel and C.R. Johnston. Mabel Sherman Johnston was an artist and a pilot who married Charles R. Johnston and moved to Tulsa, Oklahoma with him, where he managed the Spartan School of Flying and where she rated as a flight instructor at the school and ultimately trained pilots for WWII. They later moved to Springfield in 1947, where he became manager of the then newly-opened Capital Airport. In addition to the materials listed above, this collection also contains bound volumes of aviation magazines and graduating class books from the Spartan School as well as materials from Mr. Johnston's later career as manager at Allis Chalmers.