Waghorn Sidebottom 14a

Sidebottom 14a is a marking recorded in neither Sidebottom nor Smith — one of the discoveries that this census brings to the published record. It is known from 1838, placing it among the agency's active middle years, alongside the related 14 and 14b types.

Struck in black, it belongs to the most interesting category in the whole series: marks that the standard catalogues never listed, and which are documented here for the first time from surviving covers. Their populations are unknown and almost certainly very small, so each recorded example is genuinely new evidence about the range of cachets Waghorn's agency actually employed.