This series of postcards depicts scenes from around Westminster School. They were numbered by R.S. Chalk (OW), who penned the following note regarding the series in 1976:

"Westminster School Postcards c.1911
(Purchased up Suts. c.1923)
1,2 - Staff
3-12 - School & Busby Library etc.
13-19 - College
20 - 25 Ashburnham & Library
26-31 - Yard, Rigaud's, Grant's
32-33 - Dean's Yard
34-36 - College Hall
37,38 - Science Labs
39-44 - Fields and Gym
45-47 - O.T.C.
48 - Carpenter's Shop

It would seem 9 of the original 57 p.c.s are missing. These included (i) Interior of Suts (alas!); (2) Art School (memories of incredible character W. Kneen); (3) Ashburnham Staircase (? two); (4) Fields); also perhaps a second view of College Garden
R.S.C, 1976"

Chalk annotated the back of the postcards he had in his possession. These annotations are included in each record for which they are present.
Each postcard in this series is marked 'Westminster School Series AFB' on the reverse. While the meaning of 'AFB' is uncertain, it is possible it may refer to the initials of the photographer, who is potentially a College John named Arthur Brown. This speculation is drawn from information included in Chalk's captions.