Cover with manuscript 'Postpaid' and 'Paid 8d' on front with fair strike of straight line 'WARINGSTOWN' marking in black on reverse with boxed 'PAID AT BANBRIDGE' marking in red on front and BANBRIDGE cds dated MAY 22 1837 on reverse. Addressed to DUBLIN with boxed 'PAID' arrival mark in red on front. This is the earliest known use of the 'WARINGSTOWN' mark. Scarce.