Date: 1746

"And with him took none but O'Neil, / Whose heart he found as true as steel"

— Graham, Dougal (bap. 1721, d. 1779)

Date: 1748

"the Persian Bands / In fearful Wonder ask; What God unseen / Such Pow'r bestow'd, and steel'd a Woman's Heart"

— Warton, Thomas, the elder (1688-1745)

Date: 1748

"These be now my Cares, / To leave the Muse for Virtue [...] but chief my Soul to steel / With adamantine Honour"

— Warton, Thomas, the elder (1688-1745)

Date: 1754

"The mind of man does often what princes and states have done. It gives a currency to brass and copper coined in the several philosophical and theological mints, and raises the value of gold and silver above that of their true standard."

— St John, Henry, styled first Viscount Bolingbroke (1678-1751)

Date: 1767

"Love has made me stout and strong; /Has given me a charm, / Will not suffer me to fall; / Has steel'd my heart, and nerv'd my arm, / To guard my precious all."

— Garrick, David (1717-1779)