"[H]is heart was shod with a metal much harder than iron, which he was afraid nothing but hell-fire would be able to melt."
The Adventures of Peregrine Pickle
33 entries in ESTC (1751, 1758, 1763, 1765, 1769, 1773, 1775, 1776, 1778, 1779, 1781, 1784, 1785, 1786, 1787, 1788, 1791, 1793, 1794, 1798, 1799, 1800).<br>
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Smollett, Tobias. <u>The Adventures of Peregrine Pickle. In which are included, Memoirs of a Lady of Quality.</u>, 4 vols. (London: Printed for the author, 1751). &lt;<a href="http://estc.bl.uk/T55344">Link to ESTC</a>&gt;