United States. (Transatlantic Mail - Forwarding Agents). 1836. Folded letter written from New York '7th May 1836' addressed to Amsterdam, Holland endorsed 'per "Albertie", forwarded from New York with circular 'Forwarded By/ Saltus & Co/ N. York' in red on reverse, oval Dutch seapost 'ZEE-BRIEF/ Den Helder' in red (Van der Linden 3012) dated '20 Jun' and part Amsterdam arrival with manuscript '90' Dutch cents due rating.
The forwarding agent 'Saltus & Co, New York' is not listed by Kenneth Rowe in his book on world Forwarding agents published in 1974.