Here he devoted himself with renewed energy to his profession and acquired a large practice extending over the towns of Carmel, Somers, Yorktown, Philipstown, and Fredericksburg. He was a close student, and by patient study and industry accumulated a large fund of general and professional information. Many young men studied medicine under his superintendence and became able and successful practitioners.
Though Dr. Cornelius was an energetic man and possessed great firmness of character, he was also very kind hearted and generous—the poor received gratuitous medical attendance from him to a great extent, and while he ministered to the physical ailments of his patients, like his Master, the “Great Physician,” he was ever ready to offer spiritual comfort to those who stood in need, and kind words and advice were freely bestowed on rich and poor alike, in such measure as the case required.
His generosity was not alone confined to individuals but the church as well found him a faithful servant, a cheerful giver and an industrious worker. The Presbyterian Church Society, of Mahopac Falls (formerly known as Red Mills), to-day stands in part as a monument to his zeal and devotion to the cause of Christ, for in 1790, he in conjunction with a few other faithful ones effected its organization, and to the day of his death his contributions to its support were most liberal and his interest in its welfare unabated. He was a prime mover, too, in securing for the society its first house of worship, taking a very active part in raising funds for the erection of a suitable edifice, and its completion was to him a source of pride and satisfaction. When the church was incorporated, April 7, 1806, he was chosen one of the Trustees.
In his Will he bequeathed legacies to the following religious and charitable societies: The American Bible Society; The United Foreign Mission Society; The American Education Society, and the American Board of Commissioners for Foreign Missions.
His creed was loyalty to his country and to his God, and all through his eventful and useful life his words and deeds alike attested his sincerity. His view of life was evidently embodied in the following lines of verse which were found pasted in the inside covers of all his books.
“SOON will this glass of mortal life be run
And all its fleeting vanities be gone.
Then may I feel no more sins cruel fire,
But to the grave in faith and peace retire;
And weep no more for the licentious wrongs
Of judgments rash or scourge of slanderous tongues.”
Dr. Cornelius married for his first wife the daughter of a brother physician, Dr. Brewer, who bore him several children, all of whom died in childhood, and his wife also passed away in early life. Some years after her decease, he married Miss Rachel Stocker, who is described as possessing many excellent traits of character, and as being a woman of enlarged Christian experience. She died about the year 1833. By this marriage, five children were born to him, one son, Elias Cornelius, and four daughters: “Sally,” who married Tallman Perry, Sept. 13, 1824; Betsey, who married Ira Tompkins, March 8, 1820; Polly, who became the wife of Rev. William Lewis, and Nancy, who died unmarried at the early age of nineteen years.
The son, Elias Cornelius, who was graduated from Yale College, Sept., 1813, studied theology under Dr. Dwight, and became an eloquent and influential minister of the Congregational Church, being licensed to preach the Gospel, June 16, 1816, at Litchfield, Conn. For five years (1826-1831) he filled the office of Secretary to the American Educational Society, and through his influence and earnest labors the work of preparing young men for the ministry received a notable impetus. In January, 1832, he was chosen one of the Secretaries of the American Board of Commissioners for Foreign Missions, to succeed Jeremiah Evarts.
But it had been foreordained that his life work, so earnest and successful, should be accomplished quickly, even before he had reached his prime, for he died at Hartford, Conn., Feb. 12th, 1832, one month after his appointment, at the age of thirty-eight years. The talented poetess, Mrs. Sigourney, wrote some touching lines on his death. One son, Jeremiah Evarts Cornelius, of Boston, Mass., and two daughters, Mary Cornelius and Mrs. Sarah E. Little, of Newton Centre, Mass., are now the only living members of his family.
The daughters, reared in this Christian home, were also noted for piety, and like their father and brother, their walk in life abounded in good deeds. Their highest aim seems to have been to aid and comfort those less fortunate than themselves. They were women highly respected in the communities where their lives were spent, and valued and devoted members of the churches with which they were connected.