St. Kitts 1766 St. Christopher to Madeira via Philadelphia USA Forwarding Agent Stampless FL

Stampless folded letter, with extensive contents, datelined St. Christophers, 24 Feby, 1766, to Newton & Gordon, Merchants, Madeira, endorsed "via Philadelphia", with forwarding agent endorsement on reverse from the firm of John Wilcocks, no postal markings, some fragility to internal folds, otherwise a remarkably fresh and rare early letter from St. Kitts, exhibit-quality; the first Postmaster of St. Kitts was appointed only in 1789.