[COMBE, William]. ~ The Diaboliad, a Poem. Dedicated to the worst Man in His Majesty’s Dominions... London: Printed for G. Kearsl[e]y... MDCLXXVII [i.e. 1777].
[—————]. The Diaboliad. A Poem. Part the second. By the Author of Part the First. Dedicated to the worst Woman in His Majesty’s Dominions... London: Printed for J. Bew... 1778.
[—————]. Additions to the Diaboliad, a Poem. Dedicated to the worst Man in His Majesty’s Dominions. By the same Author. London: Printed for G. Kearsley... 1777.
3 parts together, the first two stitched together as issued, 4to (275 × 223 mm) in half-sheets, pp. , iv, 24; , iv, 46,  advertisements; , 13, ; complete with half-titles; first and last pages, and some margins, a little dusty; entirely uncut and stab-sewn, as issued.
First editions. Combe’s famous satire on the notorious rake Simon Luttrell, Lord Irnham, whose nickname was the ‘King of Hell’. The poem proved ‘a great success, earning Combe recognition as the best satirist since Charles Churchill’ (Oxford DNB).
These are not uncommon, but it is rare to find them in original condition, as here. Jackson, p. 52; 61 & 51.