Port Arthur station, to which Mr. O’Brien was removed from Maria Island, was a place of punishment for convicts who, while serving out their terms of transportation, had committed fresh offences against the law.  After a detention there for some time, Mr. O’Brien, whose health was rapidly sinking under the rigours of his confinement, was induced, by letters, from his political friends to accept the ticket-of-leave and avail of the comparative liberty which they enjoyed.  The government, on his acceptance of their terms, placed him first in the district of New Norfolk, and subsequently in that of Avoca, where he remained until the conditional pardon, already mentioned in these columns, was granted in 1854.  He then left Australia, went on to Madras, where he made a stay of about a month; from thence he went to Paris and on to Brussels, where he was joined by his wife and children.  He next made a tour in Greece, and was in that country when the unconditional pardon, which permitted him to return to his native land, was granted in the month of May, 1856, immediately after the close of the Crimean war.  On Tuesday, July 8th, 1856, Mr. O’Brien stood once more upon his native soil after an exile of eight years.  The news of his arrival was joyfully received by his fellow-countrymen, who welcomed him with every mark of respect and affection whenever he appeared among them.  Thence-forward Mr. O’Brien took no active part in Irish politics, but he frequently offered advice and suggestions to his countrymen through the medium of letters and addresses in the Nation.  In February, 1859, Mr. O’Brien made a voyage to America, and during the ensuing months travelled through a great portion of that country.  After his return to Ireland he delivered, in November, 1859, an interesting series of lectures on his tour, in the.  Mechanics’ Institute, Dublin.  On July 1st, 1863, he lectured in the Rotundo, Dublin, for the benefit of a fund which was being raised for the relief of the wounded and destitute patriots of the Polish insurrection.  In the early part of the year, 1864, the health of the illustrious patriot began rapidly to fail, and he was taken by his friends to England for a change of air.  But the weight of many years of care and suffering was on him, and its effects could not be undone.  On the 16th of June, 1864. at Bangor, the noble-hearted patriot breathed his last.  His family had the honoured remains brought to Ireland for interment in the old burial-ground of his fathers.  On Thursday morning at an early hour they reached Dublin on board the “Cambria” steamer.  It was known that his family wished that no public demonstration should be made at his funeral, but the feelings of the citizens who desired to pay a tribute of respect to his memory could not be repressed.  In the grey hours of the morning the people in thousands assembled on the quays to await the arrival of the remains, and two steamers, which had been chartered for the purpose, proceeded,