WALES POLICE POSTS MAP
GWR DETECTIVE DEPARTMENT DISTRICTS 1912
Photograph of a large map, dated January 1912, mounted on stiff board showing the extent of GWR lines and location of the sixteen GWR Detective Department Districts.
The Districts are each identified by a capital letter. They are :-
| A) London | B) Bristol | C) Cardiff | D) Birmingham |
| E) Swansea | F) Plymouth | G) Reading | H) Chester |
| J) Westbury | K) Pontypool | L) Gloucester | M) Shrewsbury |
| N) Fishguard | P) Camarthen | R) Birkenhead | S) Truro |