By the late 18th century, ventriloquist performances were an established form of entertainment in England, although most performers threw their voice to make it appear that it emanated from far away, rather than the modern method of using a puppet. A well-known ventriloquist of the period, Joseph Askins, who performed at the Sadler's Wells Theatre in London in the 1790s advertised his act as "curious ad libitum Dialogues between himself and his invisible familiar, Little Tommy". However, other performers were beginning to incorporate dolls or puppets into their performance, notably the Irishman James Burne who "... carries in his pocket, an ill-shaped doll, with a broad face, which he exhibits ... as giving utterance to his own childish jargon," and Thomas Garbutt.