 The pipe was laid in sections between the broad gauge rails with a continuous slot along the top that was sealed by a leather valve.The buildings that housed the boilers and engines were built in a decorative Italianate style with square chimneys and spaced at around intervals.The 1845 contract for 24 engines comprised sixteen of 33 inch cylinder diameter (approx 45HP), and eight of 12HP, and was split between Boulton and Watt and 'Messrs Rennie', probably J. and G. Rennie.