The Collaborative International Dictionary of English v.0.48:

Inlagation \In"la*ga"tion\, n. [Law L. inlagatio, fr. inlagare
   to restore to law. See In, and Law.] (Old Eng. Law)
   The restitution of an outlawed person to the protection of
   the law; inlawing. --Bouvier.
   [1913 Webster]

Bouvier's Law Dictionary, Revised 6th Ed (1856):

INLAGATION. The restitution of one outlawed to the protection of the law.
Bract. lib. 2, c. 14.