Thrave
The Cyclopedic Law Dictionary · Walter A. Shumaker and George Foster Longsdorf; ed. James C. Cahill · 1922
The Cyclopedic Law Dictionary
TH REAVE (Sax.) L. Lat. trabes, trava.
In old English law
A measure of corn or grain, consisting of twenty-four sheaves of four shocks, six sheaves to every shock.
Stat. 2 Hen. VI. c. 2. Cowell.