9. Hocking Valley Investigation. General Assembly of Ohio, 1885.
10. Trusts or Pools. Investigation by Legislature of Ohio, 1889.
11. Alleged Combinations in Manufactures, Trade, etc. Dominion House of Commons, 1888.
[5] Richardson vs. Buhl et al. Michigan State Reports, vol. lxxvii., p. 632.
[6] Page ii.
[7] Page xxii.
[8] Coal Combination, Congress, 1893. Testimony of John C. Haddock, pp. 242-261.
[9] Same, p. iv.
[10] Report, p. xlv.
[11] Coal Combination, Congress, 1893, pp. iii., iv., vi.