Source : Webster's Revised Unabridged Dictionary (1913)

Thilk \Thilk\, pron. [Cf. {Ilk} same.]
   That same; this; that. [Obs.] ``I love thilk lass.''
   --Spenser.

         Thou spake right now of thilke traitor death.
                                                  --Chaucer.