Dum non fuit compos mentis

DUM NON FUIT COMPOS MENTIS, Eng. law. The name of a writ, which the heirs of a person who was non compos mentis, and who aliened his lands, might have sued out, to restore him to his rights. T. L.

A Law Dictionary, Adapted to the Constitution and Laws of the United States. By John Bouvier. Published 1856.