Robert Indiana kept a series of illustrated journals during the late 1950s and 1960s, in which he discusses the development of his work.
Indiana's journal page for June 6, 1962, includes a sketch of The Dietary, a 60 x 48 inch oil painting which the artist had started working on the day before. Indiana records that he continued to work on the painting, and that he painted the cerulean blue of The Triumph of Tira.
Indiana's journals also provide insight into his life on Coenties Slip. Here he describes a 45 minute sun break on the roof, and Jean [sic] (journalist Jeanne Molli) coming to the loft for a fitting by J. (fashion designer John Kloss). He also notes that he was continuing to work on his journals from two and three years ago, transcribing notes and trying to bring them up to date.