 The line carried 20,694 tons in 1903; always susceptible to fluctuations in the china clay trade outside its own control, the line suffered with the slump following that year, but increased its carryings again, so that by 1910 34,123 tons were carried.The locomotive Trewithan was replaced by a "Canopus" in 1901.A further locomotive, "Pioneer", was acquired second hand from the War Department in 1912.