LSWR Drummond 'M7' Class 0-4-4T
https://en.wikipedia.org/wiki/LSWR_M7_class
References
- Fairclough, T; & Wills, A. (1977). Southern Steam Locomotive Survey: The Drummond Classes. Truro: Bradford Barton, pp.7-25.
- Russell, J. (1991). A Pictorial History of Southern Locomotives. Sparkford: Haynes, pp.188-194s.