Grocott & Ward, comps. Grocott’s Familiar Quotations, 6th ed. 189-?.
Ground
1.How came he mad?
2.Very strangely they say.
1.How strangely?
2.’Faith e’en with losing his wits.
1.Upon what ground?
2.Why, here in Denmark.
Shakespeare.—Hamlet, Act V. Scene 1. (Hamlet, and the First Clown.)