The Great Western RailwayPyracmon Class were 0-6-0broad gaugesteam locomotives for goods train work. This class was introduced into service between November 1847 and April 1848, and withdrawn between August 1871 and December 1873. Bacchus was added to the class in May 1849 (and withdrawn in November 1869), having been constructed to broadly the same design from spare parts.
Davies, Ken (April 1993). The Locomotives of the Great Western Railway, Part 14: Names and their Origins - Railmotor Services - War Service - The Complete Preservation Story. Lincoln: RCTS. ISBN0-901115-75-4.