George Sutherland, Helvering v. St. Louis Union Trust Company…
“ If, therefore, no interest in the property involved in a given case pass 'from the possession, enjoyment, or control of the donor at his death,' there is no interest with respect to which the decedent has created a trust intended to take effect in possession or enjoyment at or after his death. The grantor here, by the trust instrument, left in himself no power to resume ownership, possession, or enjoyment, except upon a contingency in the nature of a condition subsequent, the occurrence of which was entirely fortuitous so far as any control, design, or volition on his part was concerned. ”
