The document which forms the subject of the present communication is a Spanish account, heretofore unknown, describing the English seizure of the island of Jamaica, in May, 1655, and the Spanish resistance to that invasion up to July 3 of the following year. It was written by an ecclesiastic, Captain Julian de Castilla, who was "one of those present upon these coasts, south and north, nearly fourteen months "–that is, during the entire period which his narrative covers