Dr. John C. Warren was the perfect type of an Anglo-Saxon surgeon.
His courage and dexterity were fully equalled by his kindness and sympathy for the patient.
Cool and collected in the most trying emergencies, it has been said of him that he never performed a capital operation without feeling a pain in his heart; and the evidence of this was marked upon his face, so that it is even visible in the photographs of him. He deserved to have his portrait painted by Rubens.
In 1847 Dr. Mason Warren published a review of etherization, in which he makes this important statement:
In the autumn of 1846 Dr. W. T. G. Morton, a dentist in Boston, a person of great ingenuity, patience, and pertinacity of purpose, called on me several times to show some of his inventions.
At that time I introduced him to Dr. John C. Warren.
Shortly after, in October, I learned from Doctor Warren that Doctor Morton had visited him and informed him that he was in possession of or had discovered a me