Envelope, addressed to P. O'Brien Esqr., Stamp Office, Limerick. Victoria penny red unperforated postage stamp at top right, on bluish paper, letters AH. Cancellation on stamp,"437" in a lozenge of parallel lines. Circular cancellation on front, "Limerick/ AU 23/ 1848/ E", and "Tulla" straight on reverse. Red seal, a bust? in a double rectangle. Perforation through one thickness of paper at top edge