- Islandora Repository
- Mss.B.B61_K
- Keppel, Frederick P.: From Boas. 1940 Oct. 4
- Keppel, Frederick P.: From Boas. 1941 Oct. 20
- Keppel, Frederick P.: From Boas. 1942 Feb. 5
- Keppel, Frederick P.: From M.W. Ireland. 1918 Nov. 5
- Keppel, Frederick P.: To Boas. 1903 Aug. 12
- Keppel, Frederick P.: To Boas. 1903 Dec. 9
- Keppel, Frederick P.: To Boas. 1903 Nov. 13
- Keppel, Frederick P.: To Boas. 1903 Nov. 4
- Keppel, Frederick P.: To Boas. 1903 Nov. 6
- Keppel, Frederick P.: To Boas. 1903 Oct. 22
- Keppel, Frederick P.: To Boas. 1903 Oct. 29
- Keppel, Frederick P.: To Boas. 1905 Apr. 7
