Dr. Gerardus Hilles Wynkoop died from appendicitis yesterday morning. He is the third prominent physician of this city in the last six months to fall a victim to the disease which he had made his specialty. Dr. Andrew J. McCosh, who had devoted most of his years while practising to trepanning, died several months ago in the Presbyterian Hospital from a fractured skull received in a runaway accident. Cancer, which had been Dr. W. T. Bull's life study, caused his death in Savannah after a year's illness about two months ago.
    Although Dr. Wynkoop, who was sixty-six years old, had not been in the best health for the last few months, he was able to attend to his practice. On Thursday he complained of pains in his side. Dr. A. A. Moore was called, and after an examination found that Dr. Wynkoop was suffering from appendicitis.
    Meanwhile Dr. Wynkoop's condition became so grave that Dr. Joseph A. Blake was called at midnight on Friday and an operation was performed. Dr. Wynkoop rallied and appeared to be in a fair way to recovery. All the time, like Dr. Bull, Dr. Wynkoop gave instructions regarding his case. On Saturday a sudden relapse set in, and from that time his physicians abandoned hope.
    Dr. Moore said last night that the fact that Dr. Wynkoop had held out as long as he did was remarkable. For a man of his years, said Dr. Moore, he had a remarkable constitution, and but for peritonitis having intervened he thought there would have been a good chance of saving his life.
    While attending Dr. Bull Dr. Wynkoop was stricken with a bad cold, which confined him to his home for several weeks. It was at first believed that this had brought on his fatal illness, but Dr. Moore said that he had fully recovered from the cold.
    Dr. Wynkoop was born in Wilmington, Del., in 1843. He entered Yale College and was graduated with the class of '64. He then studied in the College of Physicians and Surgeons and at Columbia College, and was graduated from the latter institution in 1866. In the same year he became physician to the New York City Dispensary, and in 1868 was professor of surgery in the Women's Medical College. He had been attending physician to the Presbyterian Hospital, surgeon to St. Luke's Hospital, consulting surgeon to the Northern Dispensary since 1882, and a trustee of the New York City public schools since 1878.
    Dr. Wynkoop was a member of the Medical Society of the County of New York, the Pathological Society, the Greater New York Medical Association, the Holland Society, the Metropolitan Museum of Art and the Union and University clubs. He married, in 1866, Ann Eliza Woodbury, daughter of General D. P. Woodbury, U. S. A. She and two daughters and two sons survive him.

Source:

Unknown, "Dr. G. H. Wynkoop, Dead," New-York Tribune, Monday, 17 May, 1909, page 7.