Definition of quadruplicate:
"1903: H.G. Wells, Mankind in the Making - The small schools might specialize upon the type locally most desirable, the larger might group its triplicate (or quadruplicate) system of sustained and serious courses about a common Library..."
"c.1886: Rudyard Kipling, "The Lovers' Litany" - Four times Cupid's debtor I-- / Bankrupt in quadruplicate."