The Millstone and New Brunswick Railroad (M&NB) was chartered in the mid-19th century as a seven-mile long branch line from New Brunswick, New Jersey to East Millstone, New Jersey. Construction was completed and the line began operation on December 19, 1854. In 1871, under the order of the company's president Martin Howell, the M&NB signed a 999-year lease with the United Jersey Railroad Company, which would later become part of the Pennsylvania Railroad (PRR) known as the "Millstone Branch." In 1915, the company was dissolved and became part of the United Jersey Railroad Company.[1]