The New Zealand Railways Magazine, Volume 9, Issue 2 (May 1, 1934.)
Diagrams drawn to same approximate scale to compare [Fig. 1] locomotive built for Canterbury railways by Slaughter Grunning & Co., 1863, cylinders 15in. × 22in., coupled wheels 5ft. 6in. diameter, with [Fig. 2] express engine built at Crewe, 1863, cylinders 16in. × 24in., and driving wheels 6ft. diameter
Diagrams drawn to same approximate scale to compare [Fig. 1] locomotive built for Canterbury railways by Slaughter Grunning & Co., 1863, cylinders 15in. × 22in., coupled wheels 5ft. 6in. diameter, with [Fig. 2] express engine built at Crewe, 1863, cylinders 16in. × 24in., and driving wheels 6ft. diameter.