Ultima Ratio
The Cyclopedic Law Dictionary · Walter A. Shumaker and George Foster Longsdorf; ed. James C. Cahill · 1922
The Cyclopedic Law Dictionary
The last resort. ULTIMA VOLUNTAS (Lat.) In old English law. Last will; the last will. In testamento suo, in ultima voluntate sua, in his testament, in his last will.
Reg. Grig. 244b.
ULTIMA VOLUNTAS TESTATORIS EST perimplenda secundum veram intentlonem suam. The last will of a testator is to be fulfilled according to his true intention.
Co. Litt. 322; Broom, Leg. Max. (3d London Ed.) 505.