Metropolitan Police: "Each recruit had to go through a relatively long selection procedure in which special officers examined his reading and writing ability, wrote down his personal details and carefully checked his credentials
and the credentials of those who recommended him, even if this entailed long journeys. Surgeons were specially employed to ensure the physical fitness of candidates".
Given the Upper Harley Street address of one of your chap's references, I presume he was the surgeon (see above). Of course a quick check of census records would confirm this.
