Who opened the first completely mechanized cotton mill?

The first cotton mill was the Beverly Cotton Manufactory, started being built in 1785, completed construction in 1787, and was built by the Proprietors of the Beverly Cotton Manufactory (corporation), who included John Cabot, George Cabot, Deborah Cabot, Andrew Cabot, Moses Brown, Joshua Fisher, Israel Thorndike, Henry Higginson, and Isaac Chapman.