1869 envelope to Calcutta, India, endorsed ‘Via Aden’ with a 1d, 4d and 6d tied by barred ‘B53’ obliterators with a MAURITIUS AP 10 69 dispatch cancel on the back. A red 10d accountancy mark is on the front of the cover, on the back is an oval ‘Forwarded By Richardson & Co, Mauritius’ forwarding agents h/s, A Sea Post Office ‘B’ 24-4-69 c.d.s. and a Calcutta arrival cancel. Fine and very uncommon.