Date: 1791

"My son! oh how could so severe a word / Escape thy lips? my fortitude of mind / Thou know'st, and even now shalt prove me firm / As iron, secret as the stubborn rock."

— Cowper, William (1731-1800)

Date: 1791

"Thou hast an iron heart! / For should that savage man and faithless once / Seize and discover thee, no pity expect / Or reverence at his hands"

— Cowper, William (1731-1800)

Date: 1791

"Thou hast an heart of iron, terrour-proof."

— Cowper, William (1731-1800)

Date: 1791

"Hard was his lot, whom these rare qualities / Preserved not, neither had his dauntless heart / Been iron, had he 'scaped his cruel doom."

— Cowper, William (1731-1800)

Date: 1791

"I will encounter him, though his hands be fire, / Though fire his hands, and his heart hammer'd steel."

— Cowper, William (1731-1800)

Date: 1791

"Thy heart is steel"

— Cowper, William (1731-1800)

Date: 1792

"Men!--Men! false! treacherous crocodiles! Your eyes are water! your hearts are iron!"

— Tytler, Alexander Fraser (1747-1813); Schiller (1759-1805)

Date: 1792

"The tears, the supplications of his father, never reach'd his iron heart.-- "

— Tytler, Alexander Fraser (1747-1813); Schiller (1759-1805)

Date: 1795, 1796

The "anvil of gnawing conscience is never cool"

— Timaeus, J. J. (1763-1809); Friedrich von Schiller (1759-1805)

Date: 1799

"Men, Men! false, treacherous crocodiles! Your eyes are water--your hearts are iron."

— Craven, Keppel (1779-1851); Schiller (1759-1805)