When judgment is confessed by virtue of a warrant of attorney for a penalty, the attorney confessing the judgment shall, in a written direction to the officer entering the judgment, set down the real debt, and the time from which interest is to be calculated; which shall be entered by the officer upon the docket of the judgment.

Code 1852, § ?2409; Code 1915, § ?4304; Code 1935, § ?4776; 10 Del. C. 1953, § ?4732;