The earlier teaser post included this image taken from the medal rolls of the Kimberley Horse.

Note the numbers 868 and 199, the apparent numbers assigned to PJ Robinson while serving in the Cape Police.
The full entry shows how any medal supposedly earned for his service in the Anglo-Boer War was not issued (note the crossed out entry):

(and what does “H.O.” mean?)
The initials “P.J.” could be Patrick John for instance, so how do we know that this refers to Philip Joseph Robinson?
Take a look at this close-up of Philip’s attestation paper for the Kimberley Horse;

The important details are; his name (obviously), his regimental number (318, matching the record above) and that he previously served in I.L.H and C.P. vis the Imperial Light Horse and Cape Police.
So far, so good.
I couldn’t find any mention of him in the ILH rolls but did find mention of PJ Robinson in the Cape Police medal rolls (Anglo-Boer War): Here is the name:
Again, the number 199 matches that on the Kimberley Horse record, and at the other end of that line is this:

So the two match. 199 Sergeant PJ Robinson of the Cape Police was also 318 Corporal PJ Robinson of the Kimberley Horse.
So who’s this?

And what did he do?

This is the only other PJ Robinson I have so far found in the Cape Police rolls; Peter Joseph Robinson, but matching number 868 and also discharged for misconduct. Typo? Perhaps a mix up of two different people’s records? Could it even be that the misconduct was giving a false name? At this stage, who knows?
But we do know Philip was prone to a name change…
Phillip Joseph here, Philip Joseph Hercules on his marriage certificate, just Joseph on his wife’s estate papers, no wonder he’s proving difficult to pin down!