Probably that is what the OP meant. No doubt I was being too precise. The line from Charlestown Junction (for not at Charlestown) to Charlestown is the original line dating in its early wagonway form to the late C18th. It was not a branch of the Kincardine Railway. The Kincardine Railway, a late addition to the network, was opened from the west to join at the new Elbowend Junction only in 1906.