The Collaborative International Dictionary of English v.0.48:

Visiter \Vis"it*er\, n.
   A visitor.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Visitor \Vis"it*or\ [Cf. F. visiteur.] [Written also visiter.]
   1. One who visits; one who comes or goes to see another, as
      in civility or friendship. "This great flood of visitors."
      --Shak.
      [1913 Webster]

   2. A superior, or a person lawfully appointed for the
      purpose, who makes formal visits of inspection to a
      corporation or an institution. See Visit, v. t., 2, and
      Visitation, n., 2.
      [1913 Webster]

            The king is the visitor of all lay corporations.
                                                  --Blackstone.
      [1913 Webster]

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

VISITER. An inspector of the government, of corporations or bodies politic.
1 Bl. Com. 482. Vide Dane's Ab. Index, h.t.; 7 Pick. 303; 12 Pick. 244.