Ac Si
A Dictionary of Law · Henry Campbell Black · 1891
A Dictionary of Law
(Lat. Asif.) Townsh, Pl. 23, 27.
These words frequently oceurin old English statutes. Lord Bacon expounds their meaning in the statute of uses: “Thestatute gives entry, not simpliciter, but with an ac si.” Bae. Read. Uses, Works, iv.
195.