single used alongside 1866 15c Black (77), each with Maltese cross cancel, on cover from Salem, Massachusetts to Zanzibar via Aden (Goodhue correspondence), red "Boston Am. Pkt. 24 Paid 31 Jul" credit datestamp, red London transit and "1d" credit handstamp, backstamped Aden and forwarded with India 8a Victoria (25), 30c stamp creased at bottom left and corner perforations separated at top left and right, very fine, an extraordinary mixed franking from this important correspondence, 2022 Philatelic Foundation certificate