In a recent Twain Journal, Kevin MacDonnell mentioned Alf Doten in connection with discussion of Clemens' 1863 decision to write under the name Mark Twain.The two journalists first met in 1864, when Twain of the Enterprise visited the mining camp of Como, where Doten was the Como correspondent for the Virginia Daily Union. 
Now a ghost town, in the 1860s Como was a well established mining camp in the Palmyra Mining District of Territorial Nevada. It was located in the low mountains southeast of Virginia City. As pointed out by MacDonnell, Doten mentions Mark Twain's visit in his heavily edited Diaries, published in the 1970s by the University of Nevada Press. Now UNR Special Collections, the agency that holds the extensive Doten papers, is transcribing all of them to put the entire file online. One part of that collection will Doten's 1863-64 columns from the Union, chief competitor of the Enterprise. In his Union column of April 13, 1864, Doten mentions Twain's visit, writing as follows:
[T]he Como Brewery still continues to produce that immortal nectar in the way of lager, of which the iniquitous "Mark Twain" was so evidently enamored during his visit here, a short time ago. Poor fellow ! he attempted many times to go out and inspect the mines, that he might report upon them, but humbly acknowledges that he could never "get past the brewery," where he sat and drank "gallons and gallons." He did succeed, however, in visiting the Whitman mine, which lies in the opposite direction from the brewery.