This underprint is believed to be from the firm Beddoe, Hulbert & Hulbert. See also Beddoe, Hulbert & Co.
1868. Unofficial underprint type 26 (over the gum) in black.
a) Vertical underprint, reading upwards
PP84 1d lake-red (SG 43 or G1)
b) Vertical underprint, reading downwards
PP84A 1d lake-red (SG 43 or G1)