(UN-1 10.)
1670. Dryden, Conq. Granada, I. Epil. Yet, though he much has failed, he begs, to-day, You will excuse his unperforming play.
1706. Watts, Horæ Lyricæ, II. 205. Ye vulgar charms of eyes and ears, Ye unperforming promisers!
1742. Melmoth, Fitzosborne Lett. (1749), 153. You … have placed in strong contraste their successful industry, with our unperforming ignorance.
1765. Goldsm., Ess., ii. Wks. (Globe), 288/2. The public has been so often imposed upon by the unperforming promises of others.
1824. Lamb, Elia, II. Capt. Jackson. You … reeled under the potency of his unperforming Bacchanalian encouragements.
