What is Writ De Idiota Inquirendo?

Legal Definition
This is the name of an old writ which directs the sheriff to inquire whether a man be an idiot or not. The inquisition is to be made by a jury of twelve men. Fitz. N. B. 232.
-- Bouviers Law Dictionary
Legal Definition
This is the name of an old writ which directs the sheriff to inquire whether a man be an Idiot or not. The inquisition is to be made by a jury of twelve men. Fitzh. Nat. Brev. 232. And, If the man were found an Idiot, the profits of his lands and the custody of his person might be granted by the king to any subject who had interest enough to obtain them. 1 Bl. Comm. 303.
-- Black's Law Dictionary