"Report of Th. Barth of his investigation of the condition of the Northern Pacific Railroad Company during trip over road Oct. 24th to Nov. 9, 1893," NP, LRR, PV, 137.H.6.8 (F), 10-11.
M. V. B. Stacy, to Oakes, July 28, 1890, NP, LRR, PV, 137.H.5.2 (F).
Kendrick to Oakes, July 30, 1891, Aug. 10, Sept. 22, 1891, W. L. Darling to Kendrick, Sept. 14, 1891, NP, LRR, PV, 137.H.5.8 (F).
Oakes to Mellen, June 30, 1893, NP, President, Letters Sent, 137.H.11.3 (B), LB 34, LB, 58, 341.
Oakes to Mellen, June 30, 1893, N.P., President, Letters Sent, 137.H.11.3 (B); Oakes to J.W. Cooper, May 10, 1893, N.P., President, Letterpress Book 34, v. 58, 341, Letters Sent, 137.H.11.3 (B), Letterpress Book 34, v. 58, 79.