The Johnny and Ginger Mercer Papers contain manuscripts, photographs, sheet music, recordings, printed materials, and memorabilia documenting the early careers (1920s through about 1931) of both Johnny and Ginger Mercer; their courtship and marriage (1930 and 1931); and Johnny Mercer's career as a songwriter, performer, and businessman as it continued after their marriage; Johnny Mercer's work as a lyricist.

Sadie Vimmerstedt, who was a resident of Youngstown, Ohio, wrote a letter to Johnny Mercer in February of 1957 suggesting that Mercer write a song entitled "When Somebody Breaks Your Heart." Mercer wrote the song, ultimately sharing authorship with her on a 50/50 basis. Mrs. Vimmerstedt's collection includes Mercer's first letter to her, a few Christmas cards from Mercer, and photographs taken at the 1963 Grammy Awards banquet.