1 son, Aylwin. Engaged in investigation of mineral resources N.W. Ontario, Canada, 1897-1898. General manager of Llanfair lead mines, N. Wales, 1898-1899. Manager Anhaltische Blei und Silberwerke, Anhalt, Germany, 1899-1900.
Engineering research in Arizona, for Phelps, Dodge & Company, New York, 1901-1902. Consulting engineer, Los Angeles, California, 1902-1909, Weed & Probert, Los Angeles and New York, 1910-1912, etc. Professor mining, 1916, dean College of Mining, since 1917, University of California.
Consulting engineer United States Bureau Mines, since 1918.