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.

N.W. Ayer & Son, Inc. lays claim to being the first and oldest advertising agency in the United States. Established in Philadelphia by Francis Ayer (1848-1923) in 1869. The Kellett Aircraft Corporation was a manufacturer of airplanes, specifically autogiros, helicopters, and aircraft for the U.S. military. This item is a thin booklet style scrapbook containing newspaper articles about a publicity stunt where a golfer flew a Kellet autogiro to each hole on the golf course at Locust Grove Country Club in Westfield, New Jersey. The demonstration was arranged by N.W. Ayer & Son to promote the Kellet autogiros. All of the articles include a photograph image.