After his publication of the article on "The Permanent Patency of the Mouth of the Aorta," or "Inadequacy of the Aortic Valves," he at once became recognized as one of the best clinicians in the city. This article appeared, in April, 1832, in the Edinburgh Medical and Surgical Journal, at a time when, as has been said, its author was not yet thirty years of age. As soon as he began his work at the Jervis Street Hospital, he gave a course of lectures, and as he was an excellent talker and a good demonstrator, he at once attracted a large class. In 1834 he joined Hargrave's School, in Digges Street, Dublin, as lecturer on the practice of medicine, and continued to hold the position for more than ten years. His success as a lecturer attracted many students from the other medical schools. Corrigan's class was often three times as large as that of other medical lecturers in the city. It not infrequently happened that as a result of his [{209}] popularity the medical class was two or even three times as large as the surgical and anatomical classes at the same institution. This was very unusual, for Dublin was famous for its anatomical instruction, and there were often five times as many pupils enrolled in the anatomy classes as in the medical classes.

It was not long before honors began to be showered upon Corrigan. When he was about forty the diploma of the London College of Surgeons was conferred upon him, and, as according to the by-laws of the institution the diploma can only be conferred after examination, Corrigan's examination was made to consist of the reading of the thesis, "Inadequacy of the Aortic Valves," before the faculty and the other members of the college. In 1849 the University of Dublin conferred upon him the degree of M.D., honoris causa.

There was only one setback in Corrigan's medical career in Dublin. When first proposed for honorary fellowship in the Irish College of Physicians, he was rejected. The reason was entirely apart from medical matters. Corrigan was the most active member of the Irish Board of Health, which had charge of the famine cases in Ireland, during the awful years between 1845 and 1850. This Board proposed to allow about five shillings per day to physicians who would be sent to the country to attend famine fever cases. It is easy to understand that this remuneration was considered inadequate and the Board's decision in the matter raised a storm of protest. Graves wrote very bitterly with regard to it, and blamed Corrigan for any part he might have had in it. The result was that for some time Dr. Corrigan was the most popularly hated physician in the medical profession of Dublin.

Corrigan made, up for any lack of tact he might have had [{210}] in this matter, however, before long, and in 1855 he obtained the license of the college. Two years later he was elected a Fellow. Before another two years had passed he was elected President of the College, and had the unprecedented honor of being re-elected four years in succession. The college further made up for its offense by having a statue of Dr. Corrigan, by the famous Irish sculptor Foley, made for its hall while he was still alive.

His own self-sacrificing work during the famine fever years was well known. After he had achieved nearly every distinction that his brother physicians could confer upon him, he was created a baronet. It was understood that this distinction was mainly meant as a reward for his services during the famine, though also for the time which he had so unstintedly given to the improvement of national education in Ireland, in the capacity of a Commissioner of Education.

Not long after his creation as a baronet, Sir Dominic stood, in Dublin, for a seat in Parliament in the Liberal interests. At first he was unsuccessful. In 1869, however, he was returned as one of the members of the government and sat in Parliament for five years. As he was a very eloquent speaker, it was thought that he would produce a very distinct impression in Parliament. His type of eloquence, however, did not prove to have any special influence in the cold British House of Commons, though Sir Dominic was always looked upon as one of the men to be counted on whenever there was under consideration legislation that affected Irish interests.

He was defeated for re-election in 1874, but it is rather to his credit than otherwise, since he had been approached by the vintners of Dublin, who were at that time all-powerful in municipal politics, and offered the membership, provided he would agree not to actively support the Sunday Closing [{211}] Bill, which was to come up at the next session of Parliament. Such an agreement Sir Dominic absolutely refused to consider as consistent with his legislative honor, and the result was the close of his Parliamentary career.

His years in Parliament, however, did not separate him from his interests either in medicine or in general science. He continued to be especially interested in zoology and made liberal contributions to the Dublin Zoological Garden. His residence at Dalkey, the grounds of which ran down to a rocky coast line, enabled him to obtain many specimens for his aquarium, and these were often transferred to the Dublin Zoological Gardens, for which he was one of the most active collectors. It was his custom during his Parliamentary career, though he was more than seventy, to leave London on Friday night and reach Dublin about eight o'clock on Saturday morning. From the station he went directly to the Zoological Gardens and took part in the pleasant breakfast which the Council of Officers of the Zoological Society, with some invited guests, had there every Saturday morning. He was noted for his humor, and his presence at these breakfasts was always appreciated, because in spite of his advancing years he was sure to add to the pleasure of the occasion.

His friends feared that his Parliamentary career might prove a serious drawback to his health at his time of life, and their fears were not without foundation. He suffered severely from gout, which left its marks upon his feet and made it very difficult for him to walk for a time, and maimed him for all his after-life. Though a man who had worked very hard all his life and who, at the age of seventy, practically took up another career, that of politics, Sir Dominic lived to be nearly eighty years of age; thus illustrating the old aphorism that "it is not work but worry that kills," and [{212}] furnishing another example of the fact that great men are great also in their superabundant vitality, and are able to spend their lives in the hardest kind of work, yet, barring accident, live on to an age beyond even that which is considered the average term of human existence.

Few men have had happier lives than Corrigan, if the high esteem of contemporaries can ever confer happiness. There was no honor in the gift of his Dublin professional brethren or of scientific bodies in which he was interested which was not conferred upon him. He was the president of the Royal Zoological Society, the president of the Dublin Pathological Society, of which he was one of the founders, and the first president of the Dublin Pharmaceutical Society. When not yet fifty years of age he was made physician in ordinary to the Queen in Ireland, and had the unapproached record of five elections to the presidency of the King and Queen's College of Physicians in Dublin--more than enough to make up for the one serious setback in his medical career, his black-balling by the college only a few years before. Foreign medical societies invited him to honorary membership and foreign universities conferred many degrees on him.