 However, in fact he converted an existing leat into a canal, the Cann Quarry Canal from his quarry to near Marsh Mills, and the Plymouth & Dartmoor Railway built a half-mile branch from near Crabtree to a basin on the canal.These works opened either on 20 November 1829 or 20 January 1830.This required transshipment from canal to the Railway, and boat operation on the fast flowing converted leat was difficult; the branch was extended northwards to Plymbridge mostly on the towpath of the canal, in 1833.