These were supplied in 1839 and four more were supplied to the GPK&R in 1840:  Mercury (No 1), Mazeppa (No 2), Wallace and Queen. In 1849, they supplied one of 2-2-2 formation for use on the Caledonian and Dumbartonshire Junction Railway, which later became part of the Edinburgh and Glasgow Railway.
In 1839, a set of four locomotives were delivered to GPK&R, followed by another four in 1840.  In 1849, they provided one of the 2-2-2 formation for use on the Caledonian and Dumbartonshire Junction Railway, which later became part of the Edinburgh and Glasgow Railway.