The collection consists primarily of correspondence, photographs and memorabilia documenting Allison’s friendship and political association with John Diefenbaker – starting with Allison’s advice to Diefenbaker about his leadership convention in 1948. In addition to correspondence, there are a few detailed notes to file documenting conversations between Allison and Diefenbaker, including a 19-page document entitled “Notes on the Election of the Diefenbaker Government” (1957), which also covers the appointment of Diefenbaker’s first cabinet.