Date: 1797

"For then first throbb'd an heart of steel."

— O'Keeffe, John (1747-1833)

Date: 1798

"Begone, iron-hearted wretch!"

— Holcroft, Thomas (1745-1809)

Date: 1798

"And, sir, it may be prudent for you to remember, that a soldier's heart is like his sword, formed of tempered steel; for while it bends with sympathizing pity to the touch of woe, it can resume its springing energy to punish arrogance, or crush oppression"

— Morton, Thomas (1764-1838)

Date: 1798

"But I'm a Bust with Heart of Steel, / That can nor Pain nor Pleasure feel."

— Elizabeth [née Lady Elizabeth Berkeley], margravine of Brandenburg-Ansbach-Bayreuth [other married name Elizabeth Craven, Lady Craven] (1750-1828)