Lovegold in Miser and Oldcastle in the Intriguing Chambermaid (both by Fielding), Abel Drugger in the Tobacconist (an alteration by Francis Gentleman of Jonson's The Alchemist) and many other parts followed.
On 13 June 1800 he appeared for the first time at the Haymarket as Zekiel Homespun in The Heir at Law by Colman, a character in the line he subsequently made his own.
On 5 August 1822, under the patronage of the Duke of York, several plays and a concert, were given at Covent Garden for the benefit of Emery's aged parents, widow and seven children.
His Ralph in the Maid of the Mill by Bickerstaffe, Dougal in Rob Roy (another adaptation by Terry) and Hodge in Love in a Village were unsurpassable performances.
In the New Monthly Magazine, October 1821, a writer, assumably Talfourd, says Emery: Hazlitt says of his acting: "It is impossible to praise it sufficiently because there is never any opportunity of finding fault with it", and Leigh Hunt says he does not know one of his rustic characters "in which he is not altogether excellent and almost perfect".
517, his Tyke is declared inimitable, and his acting is said to remind the writer of a bottle of old port, and to possess "a fine rough and mellow flavour that forms an irresistible attraction".
Gilliland's Dramatic Synopsis, says Emery's delineation of Orson in Colman's The Iron Chest is "a fine picture of savage nature characterised by a peculiar justice of colouring".