Cunard Line (Halifax - Bermuda - St. Thomas)

The Cunard Line operated a feeder route between Halifax, Bermuda and St. Thomas from 1854 to 1886. 

Arecibo, Puerto Rico, May 10, 1861, carried outside the mails to San Juan by Amell Julia & CA forwarder. "PAID AT SAN JUAN PORTO RICO" crowned circle, May 11, 1861, paid 1 shilling British sea postage per Royal Mail Steam Packet Co. Clyde to St. Thomas, May 14, 1861, transit then Cunard Merlin via Bermuda to Halifax, then via Cunard America to Boston. Boston, May 30, 1861 transit marking. Rated 5¢ due as unpaid letter arriving via Cunard line. Sismondo Cert.

Mayaguez, Puerto Rico, September 27, 1862, endorsed per Maruonia then per Cunard Line Merlin from St. Thomas or possibly Bermuda to Halifax. Rated 1 shilling British sea postage. Then by non-contract ship to Portland Maine, October 23, 1862. Rated due 8, double 3¢ domestic rate plus 2¢ ship letter fee.

San Juan, Puerto Rico, March 26, 1865, paid 1 shilling British sea postage per RMSP packet to St. Thomas, March 28, 1865, then Cunard Alpha via Bermuda to Halifax, then via St. John to Boston by steamboat. Boston, April 21, 1865 transit marking. Rated 10¢ due treaty rate from Halifax to New York. Illustrated in Danish West Indies Mails 1754-1917, Volume I: Postal History p. 52.