Portraits of pre-war cadets | Gwulo: Old Hong Kong

Portraits of pre-war cadets

Hello everyone, I would like to find the source of these portraits of cadets. Any suggestions are greatly appreciated.

Heads of Police Force
Portraits of heads of Police Force, captured in the Hong Kong Police Force 175th Anniversary Commemorative Book. Portraits of Charles Messer and Edward Wolfe are what I focused on.
john roskruge wood jr.jpg
A portrait of John Roskruge Wood and his wife, received from a descendant of him. 
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