William A. Clark incorporated the Royal Gold and Silver Mining Company on May 2, 1891. The company established its office in Anaconda, but moved it to Deer Lodge on August 22, 1891. Larabie Bros & Co. Bankers of Deer Lodge was its official depository. The company owned six mines: the Etna, Extension, Pine Tree, Omega, South Fraction, and Royal. They were located in the Philipsburg Quadrangle near the towns of Princeton, Granite, and Royal, all in Granite County. The mines produced free gold and covered an area of 94.87 acres. The Royal Mine, located near Granite, operated mostly in the 1890s and produced about $1,000,000 in gold, with $8 to $200 of gold to the ton. After 1910, the mines fell into disrepair. Many tunnels had collapsed and it was not profitable to fix them. In 1912, in an attempt to save the company, the Royal Gold and Silver Mining Company was reorganized as the Royal Mining Company. The company also began to lease its properties. Finally, in 1920, W.A. Clark advised the directors to close the company's affairs. On October 30, 1920, the stockholders voted to sell the company. When a purchaser could not be found, the property was let go for taxes.