There are of course no photographs of 'Lochdubh' or none that I am prepared to use, but this Maitland cartoon comes close. It appears to show a military policeman - not Tom this time I think - ordering a swaggering officer to muzzle his dog, and he has to comply.
You can tell these are cavalry troops by the spurs drawn on every heel.
The cavalry was moving around the same relatively small area of northern France at this time. It is difficult to pinpoint exactly where the incident with Yadram Singh took place.
Yadram Singh (under a slightly different name) and his victim are both commemorated at Neuve Chapelle.
Lochdubh here represents the major issue facing the Indian Cavalry at the time: the army has been so decimated it has left the Western Front but the cavalry clings on; its original officers have led from the front and often been killed; their replacements are not Indian Service and many speak no Hindi.
Fact and Fiction
My account of the murder builds on the description of the crime which Tom offers, but I was not there, and we can never know the truth of it. What is clear is that Tom was uneasy enough about the man's crime and punishment to record everything in considerable detail.