Reddens Causam Scientiæ
The Cyclopedic Law Dictionary · Walter A. Shumaker and George Foster Longsdorf; ed. James C. Cahill · 1922
The Cyclopedic Law Dictionary
Giving the reason of his knowledge. In Scotch Practice. A formal phrase used in depositions, preceding the statement of the reason of the witness' knowledge.
2 How. St. Tr. 715.