1To James Madison from John Stevens, 15 April 1803 (Madison Papers)
Letter not found. 15 April 1803. Mentioned in William Thornton to Stevens, 29 Apr. 1803 (listed in the preliminary volume of Calendar of the Stevens Family Papers [Newark, N.J., 1940], item 244), as dealing with Stevens’s boiler invention. In 1996 the New Jersey Historical Society was unable to locate Thornton’s letter. On 11 Apr. 1803 a patent for “a new and useful improvement In producing...