Date: 1780, 1788

"Authority! unfeeling power, / Whose iron heart can coldly doom / The Debtor, dragg'd from Pleasure's bower, / To sicken in the dungeon's gloom."

— Hayley, William (1745-1820)

Date: 1788

"O yes, this is his valet that Lady Jane mentioned, this is her O'Donovan and my Aircourt, but my heart is steel'd against him"

— O'Keeffe, John (1747-1833)

Date: 1789

"'Is there a Man, who, wealthy to no end, / 'Ne'er knew the common wish to be a Friend, / 'Whose callous Heart's to all Compassion steel'd?"

— Combe, William (1742 -1823)

Date: 1790

"Is there a man whose iron heart is proof / Against such charms?"

— Hurdis, James (1763-1801)

Date: 1791

"The generous Mind expanding into Joy, / While no mean Passion mixt its base Alloy;"

— Polwhele, Richard (1760-1838)

Date: 1792

"The King of England steels his heart against us"

— Colman, George, the younger (1762-1836)

Date: 1796

"E'en they th' impressive dart of love can feel, / Whose stubborn souls are sheath'd in triple steel."

— Falconer, William (bap. 1732, d. 1770)