An American surgeon and inventor, who worked on rapid transit in New York City.
Gilbert studied at the New York College of Physicians and Surgeons and graduated to become a physician and surgeon. During his time in New York City, Gilbert became concerned with the cramped and overly centralized living conditions of the working class, seeing this as a major public health hazard, and began thinking about urban rapid transit as the key to provision of more sanitary living conditions.
Towards the end of the war, Gilbert's own medical issues prevented him from a further career in this field. Gilbert subsequently became Superintendent of the Central Railroad of New Jersey, where he worked on developing rapid transport in the New York City area.
