- Islandora Repository
- Mss.B.B61_K
- Keppel, Frederick P.: To Boas. 1905 Aug. 4
- Keppel, Frederick P.: To Boas. 1905 Dec. 19
- Keppel, Frederick P.: To Boas. 1905 July 6
- Keppel, Frederick P.: To Boas. 1905 June 17
- Keppel, Frederick P.: To Boas. 1905 June 21
- Keppel, Frederick P.: To Boas. 1905 Sept. 23
- Keppel, Frederick P.: To Boas. 1906 Apr. 23
- Keppel, Frederick P.: To Boas. 1906 Feb. 27
- Keppel, Frederick P.: To Boas. 1906 Jan. 8
- Keppel, Frederick P.: To Boas. 1906 Mar. 6
- Keppel, Frederick P.: To Boas. 1906 May 19
- Keppel, Frederick P.: To Boas. 1906 Oct. 6
