Born in Leominster, Massachusetts, Crocker attended the public schools and Groton Academy. He was first employed in a paper mill at Franklin, New Hampshire, in 1820. In 1823, he borrowed the money necessary to establish a paper mill at Fitchburg and served as proprietor of paper manufactures there.[1] His paper mills became the largest in the United States and he built extensive machine shops and foundries in the neighborhood of his mills. In manufacturing white paper he was the first to use cotton waste and also the first to use palm leaf fibre in wall papers.[2]
He was elected to the Massachusetts legislature in 1835, where he advocated steam communication with Boston, returned to the legislature in 1842, and obtained a charter for a new railroad between northern Massachusetts and the seaboard, which was completed through his exertions in 1845. He afterward engaged in building the Vermont and Massachusetts, the Troy and Boston, and the Hoosac Tunnel railroads, and in 1847/8 lectured in behalf of the tunnel project.[3] The Science Channel documentary Driven to Invent: Killer Tunnel called Crocker "The Father of Modern Tunneling" for his influence in advancing the use of geologists, explosives, pneumatic tools, boring technology, and said, "He laid down the rules for tunnel construction even to the present day."[4]