The object sought in this article is to collect and classify the cases in which the courts have passed on the question as to what shall be done with property over which a power of appointment has been given; when it finally turns out for some reason that the power has not been exercised. It is not the object to establish any particular thesis, but rather to ascertain how the adjudicated cases stand.
Rood, John R. "The Disposition to Be Made of Property the Subject of a Power if the Power Is Not Exercised." Mich. L. Rev. 15 (1917): 386-412.