Two collections relating to the life and career of U.S. Senator William E. Borah of Idaho: The William E. Borah Papers, consisting primarily of his published speeches, photographs, notebooks and other campaign items, and the C.P. Connolly Correspondence with William E. Borah and Albert E. Horsley (Harry Orchard) consisting of 36 letters (1907-1930) to Christopher Powell Connolly (1863-1935) from Borah and 4 letters (1908-1920) to Connolly from Albert E. Horsley (Harry Orchard), convicted assassin of Idaho Governor Frank Steunenberg. C.P. Connolly was a Journalist, mainly with Collier?s Weekly, known as one of the muckrakers.