cover 1841 (22 June) entire letter from a Missionary at Sambus in Dutch Borneo addressed to New York, routed via Singapore, rated "39½" and overwritten "Free", showing oval-framed "FORWARDED BY/J. BALESTIER/SINGAPORE" cachet in blue on reverse, and unframed "SHIP" with Boston transit c.d.s. in red on face. A fine forwarded cover from an uncommon origin