Æstimatio Capitis
Black's Law Dictionary · Henry Campbell Black, M.A. · 1910
Black's Law Dictionary
In Saxon law. The estimation or valuation of the head; the price or value of a man. By the laws of Athelstan, the life of every man not excepting that of the king himself, was estimated at a certain price, which was called the were or æstimatio capitis. Crabb, Eng. Law, c.
4.