James Smithson makes his will while residing in Bentinck Street, Cavendish Square, London. The conditions for the bequest to the United States are: "In the case of the death of my said Nephew [Henry James Hungerford] without leaving a child or children, or the death of the child or children he may have had under the age of twenty-one years or intestate, I then bequeath the whole of my property, . . . to the United States of America, to found at Washington, under the name of the Smithsonian Institution, an Establishment for the increase & diffusion of knowledge among men."