At Law
Black's Law Dictionary · Henry Campbell Black, M.A. · 1910
Black's Law Dictionary
According to law; by, for or in law; particularly in distinction from that which is done in or according to equity; or in titles such as sergeant at law, barrister at law, attorney or counsellor at law.
See Hooker v. Nichola, 116 N. a 157, 21 S. E. 208.