This fascinating contribution to the history of human trafficking by Don Aldus has been sited in more recent times, by historian Kevin Brown, in Passage to the World, The Emigrant Experience 1807-1940. Copyright 2013 and published by SeaForth Publishing, Pen & Sword Books, Ltd.
Essayist Glenn S. Michaels has demonstrated that virtually the full text Coolie Traffic and Kidnapping appears in yet another book published by McCorquodale & Co., eight years later, in 1886: Don Aldus, The Rover. The author of that illustrated volume is identified as Capt. George. D. Donald.
Given that the latter includes a drawing of youngish man labelled as Don Aldus, Michaels surmises that Don Aldus and Capt. George D. Donald are likely one and the same person. This inference is also supported by the fact that the volume is written in the first person and that its protagonist is, throughout, identified by others as "Mr. D."
Michaels' essay may be found at
http://gsmichaels.blogspot.com/2015/05/don-aldus-man-of-mystery-literary.html.