Here is one of the most important books about Gold Rush California, particularly its early days: Eldorado, or, Adventures in the Path of Empire, by Bayard Taylor, published in 1850. Taylor was a newsman from New York who traveled to California not to find gold, but to report on the rush. He writes about the mining camps, California's constitutional convention, and other aspects of life at the time the state was being inundated with prospectors. $1,150.
The Arader Galleries are located in New York, Philadelphia, Houston, Denver, and San Francisco. The telephone number for the New York office is 212-628-3668. Their website is found at www.aradergalleries.com.