DUNCAN, John. ~ An Essay on Happiness, in four Books... London: Printed for T. Cadell. 1772.
8vo (210 × 122 mm), pp. xix, , 221, , including half-title; engraved title vignette by Isaac Taylor; contemporary calf; spine gilt, red morocco label; rubbed, upper joint cracked toward head, but firm; engraved bookplate of Sir Thomas Miller, Bt.
Second, enlarged edition, almost twice as long as the first of 1762. In 4 books, with copious supporting notes, the poem is much indebted to contemporary philosophers, not to mention Milton; among those cited are Ferguson, Lord Kames, Leibnitz, Law, Shaftesbury, Bolingbroke, and Voltaire.
Duncan had been a military chaplain and served with the King's Own regiment during the Scots' uprising of 1745–6 and later at the siege of St Philip's, Minorca. In 1763 he gained the rectory of South Warnborough, Hampshire, which he retained until his death. This edition not in Jackson.