Dr. Joseph Pownall made an overland journey from Louisiana to California seeking gold in 1849. After working the Mariposa diggings, he went to Columbia in 1852 and bought stock in the Tuolumne County Water Company, where he served as a company officer until his death. Dr. Pownall married Mary C. Harrison Newall, the widow of William Henry Newell, who had been one of the founders of the Tuolumne County Water Company in 1851.
From the description of William A. Sharp letters, 1850, 1870. (Louisiana State University). WorldCat record id: 436225267