"At the age of twelve years he embraced the rigid system of the Stoicks, which taught him to submit his body to his mind, his passions to his reason; to consider virtue as the only good, vice as the only evil, all things external, as things indifferent."
The History of the Decline and Fall of the Roman Empire
Published in six volumes: vol. I in 1776; vols. II and III, 1781; vols. IV, V, and VI, 1788-1789. At least 36 entries in ESTC (1776, 1781, 1782, 1783, 1784, 1787, 1788, 1789, 1790, 1791, 1797).<br>
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See <u>The History of the Decline and Fall of the Roman Empire. By Edward Gibbon, Esq; Volume the First.</u> (London: Printed for W. Strahan; and T. Cadell, in the Strand, 1776). &lt;<a href="http://estc.bl.uk/T78356">Link to ESTC</a>&gt;<br>
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Searching in  Edward Gibbon, <u>The History of the Decline and Fall of the Roman Empire, </u>ed. J.B. Bury with an Introduction by W.E.H. Lecky (New York: Fred de Fau and Co., 1906), in 12 vols.