In 1791 he joined the society and continued his writings as well as working in the weaving trade. In 1798 he marched with the Army of Ulster and took part in the Battle of Antrim. With the collapse of the rebellion, he went into hiding but eventually gave himself up and was put in jail. With no self-confession and no evidence to prove treason, he was released on condition he transport himself to America, which he did. He stayed there until an amnesty was announced and then returned home to Ballycarry around 1800, where he tried to enlist in the local yeomanry but was rejected when the local landlord remembered him from the uprising.