By 1900, the Knox stationary and marine engines built by Camden-Anchor-Rockland Machine Co. of Rockland, Maine, had made their appearance. By 1912, the line included models from 3 to 15 horsepower. A news article from 1912 related the story of a sea voyage by motorboat equipped with a 3-horsepower Knox motor. The 4,400-mile trip from Providence, R.I. to Rome, Italy, was made without a hitch. Know engines were given patent protection under 776,406 and 849,797, both issued to Elden P. Lamb. These engines would run on either gasoline or kerosene and be guaranteed not to carbonize. The company had its origins as Lamb Gas Engine & Power COmpant and was later succeeded by Rockland Machine Company.