A few days after, the English army advanced to force the lines of Ticonderoga. Unfortunate Roche was left desolate and alone in the wilderness, an outcast from society, apparently abandoned by all the world. His resolution and fidelity to his cause, however, did not desert him. He pursued his way through the woods till he fell in with a party of friendly Indians, and by extraordinary exertions and forced marches, arrived at the fortress with his Indians, to join in the attack. He gave distinguished proofs of his courage and military abilities during that unfortunate affair, and received four dangerous wounds. He attracted the notice of General Abercrombie, the leader of the expedition; but the stain of robbery was upon him, and no services, however brilliant, could obliterate it.

From hence he made his way to New York, after suffering incredible afflictions from pain, poverty, and sickness. One man alone, Governor Rogers, pitied his case, and was not satisfied of his guilt. In the year 1785, Roche received from his friends in Ireland a reluctant supply of money, which enabled him to obtain a passage on board a vessel bound for England, where he arrived shortly afterward. He reserved part of his supply of money for the purchase of a commission, and hoped once more to ascend to that rank from which he had been, as he thought, unjustly degraded; but just as the purchase was about to be completed, a report of his theft in America reached the regiment, and the officers refused to serve with him. With great perseverance and determined resolution, he traced the origin of the report to a Captain Campbell, then residing at the British Coffee-house, in Charing-cross. He met him in the public room, taxed him with what he called a gross and false calumny, which the other retorted with great spirit. A duel immediately ensued, in which both were desperately wounded.

Roche now declared in all public places, and caused it to be every where known, that, as he could not obtain justice on the miscreant who had traduced his character in America, he would personally chastise every man in England who presumed to propagate the report. With this determination, he met one day, in the Green Park, his former colonel, Massy, and another officer, who had just returned home. He addressed them, and anxiously requested they would, as they might, remove the stain from his character. They treated his appeal with contempt, when he fiercely attacked them both. They immediately drew their swords, and disarmed him. A crowd of spectators assembled round, and being two to one they inflicted severe chastisement on Roche. Foiled in his attempt, he immediately determined to seek another occasion, and finding that one of them had departed for Chester, Roche set out after him with the indefatigable perseverance and pursuit of a bloodhound. Here Roche again sought him, and meeting him in the streets, again attacked him. Roche was, however, again defeated, and received a severe wound in the sword-arm, which long disabled him.

But that redress to his character now came accidentally and unexpectedly, which all his activity and perseverance could not obtain. Bourke, the corporal, was mortally wounded by a scalping party of Indians, and on his death-bed made a solemn confession that he himself had actually stolen the fowling-piece, and sold it to Roche, without informing him by what means he had procured it, and that Roche had really purchased it without any suspicion of the theft. This declaration of the dying man was properly attested, and universally received, and restored the injured Roche at once to character and countenance. His former calumniators now vied with each other in friendly offers to serve him; and as a remuneration for the injustice and injury he had suffered, a lieutenancy in a newly-raised regiment was conferred upon him gratuitously. He soon returned to Dublin with considerable eclat; the reputation of the injuries he had sustained, the gallant part he had acted, and the romantic adventures he had encountered among the Indians, in the woods of America, were the subject of every conversation. Convivial parties were every where made for him. Wherever he appeared, he was the lion of the night. A handsome person, made still more attractive by the wounds he had received, a graceful form in the dance, in which he excelled, and the narrative of "his hair-breadth 'scapes," with which he was never too diffident to indulge the company, made him at this time "the observed of all observers" in the metropolis of Ireland.

But a service which he rendered the public in Dublin deservedly placed him very high in their esteem and good-will. It was at this time infested with those miscreants who were known by the names of "sweaters," or "pinkindindies," and every night some outrage was perpetrated on the peaceable and unoffending inhabitants. One evening late, an old gentleman with his son and daughter, were returning home from a friend's house, when they were attacked on Ormond-quay by a party of them. Roche, who was accidentally going the same way at the same time, heard the shrieks of a woman crying for assistance, and instantly rushed to the place. Here he did not hesitate singly to meet the whole party. He first rescued the young woman from the ruffian who held her, and then attacking the band, he desperately wounded some, and put the rest to flight. His spirited conduct on this occasion gained him a high and deserved reputation, and inspired others with resolution to follow his example. He formed a body, consisting of officers and others of his acquaintance, to patrol the dangerous streets of Dublin at night, and so gave that protection to the citizens which the miserable and decrepit watch were not able to afford.

But he was not fated long to preserve the high character he had acquired. His physical temperament, impossible to manage, and his moral perceptions, hard to regulate, were the sport of every contingency and vicissitude of fortune. The peace concluded in 1763 reduced the army, and he retired in indigent circumstances to London, where he soon lived beyond his income. In order to repair it, he paid his addresses to a Miss Pitt, who had a fortune of £4000. On the anticipation of this, he engaged in a career of extravagance that soon accumulated debts to a greater amount, and the marriage portion was insufficient to satisfy his creditors. He was arrested and cast into the prison of the King's Bench, where various detainers were laid upon him, and he was doomed to a confinement of hopeless termination. Here his mind appears to have been completely broken down, and the intrepid and daring courage, which had sustained him in so remarkable a manner through all the vicissitudes of his former life, seemed to be totally exhausted. He submitted to insults and indignities with patience, and seemed deprived not only of the capability to resent, but of the sensibility to feel them.

On one occasion he had a trifling dispute with a fellow-prisoner, who kicked him, and struck him a blow in the face. There was a time when his fiery spirit would not have been satisfied but with the blood of the offender. He now only turned aside and cried like a child. It happened that his countryman, Buck English, a personage of some notoriety, was confined at the same time in the Bench; with him also he had some dispute, and English, seizing a stick, flogged him in a savage manner. Roche made no attempt to retaliate or resist, but crouched under the punishment. But while he shrunk thus under the chastisement of men, he turned upon his wife, whom he treated with such cruelty, that she was compelled to separate from him, and abandon him to his fate.

At length, however, an act of grace liberated him from a confinement under which all his powers were fast sinking; and a small legacy, left him by a relation, enabled him once more to appear in the gay world. With his change of fortune a change of disposition came over him; and in proportion as he had shown an abject spirit in confinement, he now exhibited even a still more arrogant and irritable temper than he had ever before displayed. He was a constant frequenter of billiard tables, where he indulged in insufferable assumption, with sometimes a shrewd and keen remark. He was one day driving the balls about with the cue, and on some one expostulating with him that he was not playing himself, but hindering other gentlemen from their amusement; "Gentlemen!" said Roche, "why, sir, except you and I, and one or two more, there is not a gentleman in the room." His friend afterwards remarked that he had grossly offended a large company, and wondered some of them had not resented the affront. "Oh!" said Roche, "there was no fear of that. There was not a thief in the room that did not consider himself one of the two or three gentlemen I excepted!"

Again his fortune seemed in the ascendant, and the miserable, spiritless, flogged and degraded prisoner of the King's Bench, was called on to stand as candidate to represent Middlesex in Parliament. So high an opinion was entertained of his daring spirit, that it was thought by some of the popular party he might be of use in intimidating Colonel Luttrell, who was the declared opponent of Wilkes at that election. In April, 1769, he was put into nomination at Brentford by Mr. Jones, and seconded by Mr. Martin, two highly popular electors. He, however, disappointed his friends, and declined the poll, induced, it was said, by promises of Luttrell's friends to provide for him. On this occasion he fought another duel with a Captain Flood, who had offended him in a coffee-house. He showed no deficiency of courage, but on the contrary even a larger proportion of spirit and generosity than had distinguished him at former periods.

Returning at this time one night to his apartments at Chelsea, he was attacked by two ruffians, who presented pistols to his breast. He sprang back, and drew his sword, when one of them fired at him, and the ball grazed his temple. He then attacked them both, pinned one to the wall, and the other fled. Roche secured his prisoner, and the other was apprehended next day. They were tried at the Old Bailey, and capitally convicted; but at the humane and earnest intercession of Roche, their punishment was mitigated to transportation.