EXTENT IN CHIEF, English practice. An execution issuing out of the exchequer at the suit 'of the crown. It is a mere "fiscal writ. See. West on Extents; 2 Tidd. Index.

2. When land was extended at a valuation too low, there was no remedy at common law but to pay the money. 15 H. VII. Nor yet in chancery, unless there was fraud, because the extent was made by the oath of a jury, and deemed reasonable according to the writ of extent for that cause: otherwise every verdict might be examined in a court of chancery. Crompt. on. Jurisdic. 55 a.