During the seventies the associates took a new partner. This was David D. Colton, one-time sheriff of Siskiyou County, brigadier-general of militia, second to Broderick in the famous Terry-Broderick duel, and still later colonel of United States Volunteers. In spite of these various military titles, Colton seems never to have seen service. But he had been active in California politics as a delegate of the Union Democratic party in 1861, and as chairman of the state central committee of that organization, and was widely known throughout the state. He was a man of fine physique, and endowed with a quick if not a profound intelligence. Colton first made the acquaintance of Charles Crocker in 1867, when the latter was on his way to inspect the work of construction of the Central Pacific beyond Elko. Three years later Crocker invited Colton to accompany him to Evanston, California, where he intended to look over, and perhaps to purchase, certain coal mining properties. According to Crocker, Colton said that he also would like to have an interest in the mines in question. Crocker, who had in the meantime completed negotiations for the purchase, replied with an offer to make Colton president and manager of the coal company if he would buy a thousand shares of its stock, which Colton immediately did.[217] The relations thus begun rapidly became more intimate. As early as 1868, Mr. and Mrs. Colton had invitations from Mr. Crocker and passes to travel on the Central Pacific. In 1869 or 1870 the two families visited the Yosemite together, and in 1871-72, when the Crockers went to Europe and the two Crocker boys were left behind at a military academy in Oakland, the Coltons looked after the children generally, and had them at the Colton house for week-ends.[218]