Date: 1700

"Hah, what did I say I Trembl'd, 'tis impossible, can my Heart tremble, that is steel'd with Power?"

— D'Urfey, Thomas (1653?-1723)

Date: 1699, 1700

"Steel your Hearts with Honour first; then with Generous Resolution; and let Aurelia nobly guide your Steps into the Temple of Perpetual Glory"

— D'Urfey, Thomas (1653?-1723)

Date: 1703

"Ah! Heart of Oak, true as Steel I warrant thee; what, you must needs know Mr. Queenlove."

— D'Urfey, Thomas (1653?-1723)

Date: April 18, 1721

"Alvarez has a Heart of Steel."

— Young, Edward (bap. 1683, d. 1765)

Date: April 18, 1721

"My Lord, you know his Heart is Steel, / 'Tis fixt, 'tis past, 'tis absolute Despair."

— Young, Edward (bap. 1683, d. 1765)