Just as you can not believe everything on the internet, its true with various published accounts in all forms—past and present. The following article about Lassen County mines appeared in the San Francisco Chronicle, May 24, 1892. Two items struck me, one which is obvious the mines of Hayden Hill were located on a spur of the Sierra Nevada Mountain, which is not the case. The other which was unusual was the mining activity at Eagle Lake which usually is never mentioned.
”Lassen County, bordering on one of the best mining counties of California, being separated from Plumas county by a spur of the Sierra Nevada, has so far developed little mineral wealth, a few claims having been prospected on Diamond Mountain, near Susanville, the county seat, have yielded some gold. Veins of silver and gold ores have also been found on the southeast side of Eagle Lake, but mining as a regular business has only been prosecuted in the extreme north of the county, sixty miles north of Susanville and nine miles south of Modoc county line in what is known as the Hayden Hill Mining District. This hill, named after one of the first locators who is buried there, is one of the highest points of a spur running out of the Eastern slope of the Sierra Nevada; its altitude is given at 7500 feet. The mines were discovered nearly twenty years ago, since which time they have been more or less continuously worked yielding to the world’s gold supply. a little over $1,000,000.”