 The family moved to Ouray, Colorado, in 1896, where Walsh bought the Camp Bird Mine (which was thought to have been worked out) and struck a massive vein of gold and silver.Now a multi-millionaire, Thomas Walsh moved his family to Washington, D.C., in 1898.After spending 1899–1900 in Paris, France, the Walshes returned to Washington where Thomas Walsh commenced the construction of a mansion on Massachusetts Avenue NW.