Teams of mules and horses towed freight and passenger barges, schooners and sloops through the canal. Cargoes included practically every useful item of daily life: lumber, grain, farm products, fish, cotton, coal, iron, and whiskey. Packet ships were eventually established to move freight through the waterway. One such enterprise—the Ericsson Line—operated between Baltimore and Philadelphia, and continued to carry passengers and freight through the canal into the 1940s. The cargo tonnage peaked in 1872 with more than 1.3 million tons transiting the canal.