On 2 June, while local employers and magistrates were holding a meeting with the High Sheriff of Glamorgan at the Castle Inn, a group led by Lewis Lewis (known as "Lewsyn yr Heliwr") marched there to demand a reduction in the price of bread and an increase in their wages. The demands were rejected, and after being advised to return to their homes, attacked the inn. Engaged by the 93rd (Sutherland Highlanders) Regiment of Foot, after the rioters seized some of their weapons, the troops were commanded to open fire. After a protracted struggle in which hundreds sustained injury, some fatal, the Highlanders were compelled to withdraw to Penydarren House, and abandon the town to the rioters.