Frank E. Schoonover was an unusual artist in that he kept fairly detailed records  of the work he executed, and entered the information in a series of books that he called his ‘daybooks.’  Incorporated into his system of entry are numbers that begin with his first commissioned illustration, listed as #1 in 1899, and end with an easel painting, #2510, in 1967, with some gaps and overlaps in the numbering.  He usually recorded the dates and time spent completing each work.  Additional information in each entry may include size, medium, models’ names, expenses, publication or story name, and a short description.  The day books have constituted a primary research tool for the compilers of the Catalog Raisonne, and dictate both the numbering and the titling of the entries.