George J. Frebert (1929-2002) was a pilot and aviation enthusiast. He authored the book Delaware Aviation History. The collection contains both materials used in the preparation of Delaware Aviation History and other items that Frebert collected dealing with Delaware aviation, aviators and airports. Much of the material was copied from historical repositories, but Frebert also collected original materals and photos from other early aviators.

George J. Frebert (1929-2002) was a pilot and aviation enthusiast who served in the Air Force during the Korean War, operated the Dover Litho Printing Company in Dover, DE, published "Delaware Aviation History," and restored vintage airplanes as a hobby. This collection contains both materials used in the preparation of "Delaware Aviation History" and other items that Frebert collected dealing with Delaware aviation, aviators and airports.

Capital Airlines was a commercial airline for the eastern, southern, southeastern, and midwestern United States from 1936 to 1961. It was the fifth largest airline in the United States. The airline was the first to offer service from the west to Washington D.C., coach class service, in-flight television, and jet-powered commercial aircraft. This collection includes materials related to Capital Airlines predecessor company, Clifford Ball Airlines, and materials created under its former name, Pennsylvania Central Airlines. There is also materials related to the Capital Airline Association. The collection documents the history of the airlines, its aircraft and employees.

Lammot du Pont, Jr. (1909-1964) was Assistant Vice President of the Wilmington Trust Company. He began his employment there in 1931, previously he was employed at the Fokker Aircraft Corporation. Lammot, Jr., assembled a large collection of books, manuscripts, prints, drawings and photographs. This collection documents the history of aviation and primarily consists of images of aircraft which date from 1915 through 1950. A majority of the images are various views of aircraft only and are devoid of people, though there are a number of images that include pilots. There are prints and lithographs of early aircraft and balloons (dirigibles) which date as early as the 1780s. The collection has been arranged into five series by format.

The collection consists of photographs taken during the first years of the United States Post Office Department air mail service. Many of these photographs are portraits of individual air mail service pilots. The first use of air mail in the United States occurred in September, 1911, while the first air mail route from Washington to New York via Philadelphia started in 1918. A transcontinental route was established by 1920. In 1925 the government transitioned out of the air mail business with the passage of the Kelly Air Mail Act, which called for commericial airlines to bid on air mail routes established by the Post Office.