A detailed first-hand account from a Whitehaven customs officer (Joseph Burrow) reporting on smuggling operations in the Isle of Man. The informant, identified as John Dexter, provides comprehensive intelligence on smuggling routes, merchant networks, vessel operations, cargo handling methods, and distribution channels to Ireland, Scotland, Wales and England. This document reveals the scale and sophistication of the smuggling trade circa early 1765, just months before the Revestment Act.