The Collaborative International Dictionary of English v.0.48:

Jerguer \Jer"guer\, n.
   See Jerquer.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Jerquer \Jer"quer\, n. [Cf. F. chercher to search, E. search.]
   A customhouse officer who searches ships for unentered goods.
   [Eng.] [Written also jerguer.]
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Jerquing \Jer"quing\, n.
   The searching of a ship for unentered goods. [Eng.] [Written
   also jerguer.]
   [1913 Webster]

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

JERGUER, Engl. law. An officer of the custom-house, who oversees the
waiters. Tech. Dict. h.t.