Scope and Contents The collection consists primarily of motivational messages written for the employees of the Ralston Purina Company dating from July 1921 through January 1964. Additional items in the collection include William H. Danforth’s obituary, a biography of Donald Danforth, Sr. upon his retirement, and two sets of letters written by Donald Danforth while traveling in 1963 and 1965. The collection is arranged chronologically. Company founder William H. Danforth wrote the weekly ...