File Report, by J. R. Finlay 1921 and Report, by E. G. Kingsford, undated, 1921, undated Box 1 In: Chapin family (Niles, Mich.) papers, 1879-1937 » Chapin Mining Company, papers
File History of Chapin Mine, 1923 typescript of newspaper article Box 1 In: Chapin family (Niles, Mich.) papers, 1879-1937 » Chapin Mining Company, papers
File Report, by M. C. Lake, 1927 Box 1 In: Chapin family (Niles, Mich.) papers, 1879-1937 » Chapin Mining Company, papers
File Undated Box 1 In: Chapin family (Niles, Mich.) papers, 1879-1937 » Indiana & Michigan Electric Company
File 1891 Box 1 In: Chapin family (Niles, Mich.) papers, 1879-1937 » Indiana & Michigan Electric Company
File 1894 Box 1 In: Chapin family (Niles, Mich.) papers, 1879-1937 » Indiana & Michigan Electric Company
File 1897 Box 1 In: Chapin family (Niles, Mich.) papers, 1879-1937 » Indiana & Michigan Electric Company