May 9, 1862
May 9 Friday – The Clemens Gold and Silver Mining Co. was formed to work 800 feet of the Monitor ledge, on Middle Hill in Aurora. The partners were: Sam Clemens, Calvin H. Higbie (d.1914), Daniel H. Twing, and J.D. LaRue. The company was incorporated on Feb. 27, 1863 with Twing and two others; Sam was not mining by then [MTL 1: 211n1]. Note: In his Aug. 10, 1906 A.D.