Printed matter from St. Thomas 23 October 1865 to Bridgewater, Nova Scotia, Canada. British 1d plate 74 cancelled with horizontal 'C51' St. Thomas, backstamped single-line arc 'ST. - THOMAS A /OC23 65' with code letter A. This postmark is extremely rare, four recorded examples in the DWI census, not listed in the publication 'GB Used Abroad: Cancellations and Postal markings by John Parmenter and Ken Gordon.