Belize 1860 ANTONIO MATHE Forwarding Agent Cover London to Guatemala

Stampless folded letter, datelined London, without London postal markings, struck in transit through Belize with oval handstamp of ANTONIO MATHE / BELIZE / HONDURS, 13mm "4". charge mark struck in black, reported by Harper used between 1853-67, a scarce example of this forwarding agent marking, ex-Drs. Harper. Mathe was the official Guatemala Postal Agent in Belize.