Twenty one from the Police Training Depot, Malacca won certificates in First Aid examinations conducted by Dr. Croucher, a further 28 passed in October 1907.
 First Aid in Malacca (1907, August 28). The Straits Times, p. 7. Retrieved from NewspaperSG.
 Shipping Notes (1907, October 3). The Singapore Free Press and Mercantile Advertiser, p. 8. Retrieved from NewspaperSG.