AS TOLD BY MR. GRYCE. “In the spring of 1840, the attention of the New York police was attracted by the many cases of well-known men found drowned in the various waters surrounding the lower portion of our great city. Among these may be mentioned the name of Elwood Henderson, the noted tea merchant, whose remains were washed ashore at Redhook Point; and of Christopher Bigelow, who was picked up off Governor’s Island after having been in the water for five days, and of another well-known milliona