In May, a British warship armed with 50 cannons sails into Boston harbor after a call for help from custom commissioners who are constantly being harassed by Boston agitators. In June, a customs official is locked up in the cabin of the Liberty, a sloop owned by John Hancock. Imported wine is then unloaded illegally into Boston without payment of duties. Following this incident, customs officials seize Hancock's sloop. After threats of violence from Bostonians, the customs officials escape to an island off Boston, then request the intervention of British troops. In July, the governor of Massachusetts dissolves the general court after the legislature defies his order to revoke Adams' circular letter. In August, in Boston and New York, merchants agree to boycott most British goods until the Townsend Acts are repealed. In September, at a town meeting in Boston, residents are urged to arm themselves. Later in September, English warships sail into Boston Harbor, then two regiments of English infantry land in Boston and set up permanent residence to keep order.