Grocott & Ward, comps. Grocott’s Familiar Quotations, 6th ed. 189-?.

Why

Whatever sceptic could inquire for,
For every why he had a wherefore.
Butler.—Hudibras, Part I. Canto I. Line 131.

The why is plain as way to parish church.
Shakespeare.—As You Like It, Act II. Scene 7. (Jaques to Duke S.)