When it became useless to offer further resistance, M'Manus retired with the peasantry to the hills, and dwelt with them for several days. Having shaved off his whiskers, and made some other changes in his appearance, he succeeded in running the gauntlet though the host of spies and detectives on his trail, and he was actually on board a large vessel on the point of sailing for America from Cork harbour when arrested by the police. His discovery was purely accidental; the police boarded the vessel in chase of an absconding defaulter, but while prosecuting the search one of the constables who had seen M'Manus occasionally in Liverpool recognised him. At first he gave his name as O'Donnell, said he was an Irish-American returning westward, after visiting his friends in the old land. His answers, however, were not sufficiently consistent to dissipate the constable's suspicion. He was brought ashore and taken handcuffed before a magistrate, whereupon he avowed his name, and boldly added that, he did not regret any act he had done, and would cheerfully go through it again. On the 10th of October, 1848, he was brought to trial for high treason in Clonmel. He viewed the whole proceedings with calm indifference, and when the verdict of guilty was brought in he heard the announcement with unaltered mien. A fortnight later he was brought up to receive sentence; Meagher and O'Donoghue had been convicted in the interim, and the three confederates stood side by side in the dock to hear the doom of the traitor pronounced against them. M'Manus was the first to speak in reply to the usual formality, and his address was as follows:--