Charta cyrographata
Black's Law Dictionary · Henry Campbell Black, M.A. · 1910
Black's Law Dictionary
In old English law
A chirographed charter ; a charter executed in two parts, and cut through the middle, (scinditur per medium,) where the word "cyrograph-um," or "chirographum," was written in large letters. Bract, fol.
34; Fleta, lib. 3, c. 14, § 3.