This column of red granite at the City of London cemetery near Ilford pays tribute to three police officers shot dead while trying to stop an armed robbery of a jeweller's shop by Latvian political emigres.
The burial plots of Sergeant Charles Tucker and Sergeant Robert Bentley lie side-by-side. The third policeman, Constable Walter Choat, is buried at Byfleet.
The three police officers died late on the evening of 16 December 1910. Never before had three London police officers been killed in the same incident - and it has only happened once since.
Inscriptions on the column reveal that the wife and son of Sergeant Tucker are also buried here. So too is the three-year old son of Sergeant Bentley, who was born five days after his father died. Tragedy on top of tragedy.
On the centenary of the killings, the Corporation of the City of London placed a memorial plaque - rather anonymous and easily missed - close to the site of the shootings on Cutler Street.
The would-be robbers were revolutionary expropriators. They were seeking to burrow in to the back of a jewellery shop at 119 Houndsditch from what was then Exchange Buildings. As well as the three police officers who died, one of the robbers suffered fatal injuries when shot by accident by an associate.
In this 1913 map, Exchange Buildings is marked in pink.
Although all the buildings from that era have gone from the area around the scene of the shootings, the street lay-out hasn't changed, and nor has the numbering of buildings on Houndsditch. 119 Houndsditch is now part of a Starbucks!
While Exchange Buildings has long gone, there's a yard with an entrance from Cutler Street which marks the spot.
In the photo below, the full length window is at the back of Starbucks. This was also very probably the location of the back wall of the jeweller's shop in 1910.
Exchange Buildings - three storeys with a single room on each floor and a tiny back yard with a sink and an outside loo - would have stood on this small car park space.
When police tried to find out why there was banging and drilling late on as Friday night, the expropriators came out firing. Just here!
Two weeks later, two of the gunmen were tracked down to a room in Stepney and perished in what became known as the Siege of Sidney Street. But that's another story ...
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