R. Harris to Board of Directors, Nov. 18, 1888, NP, LRR, PV, 137.H.5.3 (B); Wm. Mellen to T. F. Oakes, Oct. 31, 1889, Nov. 2, 1889, NP, LRR, PV, 134.F.1.4 (F); Report of Dr. Siemens of his Investigation of the Condition of the Northern Pacific, Nov. 1893, NP, 134 (F).1.7.B, pp. 7-8.