"discovery of silver and gold in the area" . "Nevada Comstock Lode mine" . "Comstock Lode" . "Big Bonanza" . "Virginia and Gold Hill Water Company" . . . . . . "discovery of silver" . "Comstock Silver Mine" . . . . . "Comstock" . "Comstock Mining District" . . "the deepest mine in Virginia city" . "Comstock silver lodes" . . "Nevada Comstock Lode" . "Comstock mines" . "Great Comstock era" . "Comstock Lode" . . . "the sole survivor" . . "Comstock water system" . . "The Comstock Lode" . . . "Comstock Era" . "Ophir" . "Yellowjacket mine disaster" . . "Comstock silver rush" . "Comstock Lode#Yellow Jacket Mine fire" . .