What is Collatione Facta Uni Post Mortem Alterius?

Legal Definition
A writ directed to justices of the common pleas, commanding them to issue their writ to the bishop, for the admission of a clerk in the place of another presented by the crown, where there had been a demise of the crown during a suit; for judgment once passed for the king's clerk, and he dying before admittance, the king may bestow his presentation on another. Reg. Orig. 31.
-- Black's Law Dictionary
Legal Definition
A writ commanding the justices to issue their writ to the bishop to admit a clerk instead of one who had been appointed by a king who has since died.
-- Ballentine's Law Dictionary