A scholarly chapter examining the illicit smuggling trade in Ireland and the Irish Sea during the eighteenth century, with particular focus on the Isle of Man's role as a smuggling entrepôt until 1765. The text covers smuggling commodities (spirits, tobacco, tea), enforcement difficulties, the closure of the Isle of Man loophole, subsequent shifts to Guernsey and Continental sources, quarantine-breaking, and marine crimes including wrecking. Directly relevant to understanding the economic context and consequences of the 1765 Revestment.