He was subsequently admitted to partnership in the concern and advanced to the position of agent, buyer, and shipper of coal between Philadelphia and Providence.
[2][1] In 1851, Jackson, coming to California via the Isthmus of Panama, became associated with Asa Simpson in the lumber trade at San Francisco, Sacramento, and Stockton.
[2] His brother, Samuel Jackson, had preceded him to the Pacific Coast, and when Jacob Jackson arrived in California, intending to go into another business, he found that his brother, who had engaged in the lumber and shipping business with Asa Mead Simpson, of Maine, had been on a vessel which was wrecked along the northern coast, and was supposed to have lost his life.
He also shipped a cargo to British Columbia during the mining excitement on the Fraser River in the early days and there remained in business for a time.
With Messrs. Kelly and Rundell, Jackson engaged in the manufacturing of lumber in Mendocino County, California, north of San Francisco, on Caspar Creek.
He continued as the principal owner of this business, with an office in San Francisco, until the time of his death, the mill having an output capacity of 100,000 feet (30,000 m) of lumber daily, and the company having 80,000 acres (32,000 ha) of redwood timberland, besides operating in connection with the industry the Caspar, South Fork and Eastern Railroad, 15 miles (24 km) in length.
[1] In 1840, while a resident of Providence,[1] Captain Jackson married Elvenia D. Durgin, of Sanbornton Bridge (now Tilton, New Hampshire), and she was 91 years of age at the time of her death, in 1919.