Waghorn Sidebottom 14

Sidebottom 14 is listed by Smith but unlisted by Sidebottom, and is known from 1838 — one of the agency's core years, when the overland service was carrying a growing share of Britain–India correspondence.

Recorded in black and carried here as Smith 14, it belongs to the group of marks that the later catalogue added to the earlier record. It is closely accompanied in this listing by two related types, Sidebottom 14a and 14b, which together show how finely the specialist literature came to divide the agency's markings. Covers bearing this mark help anchor that cluster to a firm date.