Mahl Memoir, SG-3, SG-25-27, Mahl Papers.
Wm. Mahl to CPH, May 3, 1883, CPH Papers, ser. 1, r. 32.
Mahl Memoir, CPH a-2, a-3, 26, 461, Collis P. Huntington, 1882-1900, Mahl Papers.
Mahl Memoir, CPH 26, C-1, CPH 27, B-11, CPH 26, C-13.
Mahl to CPH, Oct. 30, 1883, CPH Papers, ser. 1, r. 33.
Mahl Memoir, Colonel Samuel Gill, SG-5, SG-6, SG-7 (quote), SG-21, SG-22.
Mahl Memoir, CPH 26, C-1, CPH 27, B-11, CPH 26, C-13, Mahl Papers.