Isaac Jackman

He seems to be one of the pair young Irishmen who edited The Morning Post for a few years between 1786 and 1795, and involved the printer and proprietor in several libel cases.

[1] Jackman's Milesian, a comic opera, on its production at Drury Lane on 20 March 1777, met with an indifferent reception.

All the World's a Stage, a farce by Jackman in two acts, in prose, was first performed at Drury Lane, on 7 April 1777, and was frequently revived.

Hero and Leander, a burletta by Jackman (in two acts, prose and verse), was produced at the Royalty Theatre, Goodman's Fields, in 1787.

Jackman prefixed a long dedication to Phillips Glover of Wispington, Lincolnshire, in the form of a letter on "Royal and Royalty Theatres": it purported to prove the illegality of the opposition of the existing theatres to one just opened by John Palmer in Wellclose Square, Tower Hamlets.