|Jackson's Oxford Journal, May 9, 1801|
Lee Sugg was a well-known Ventriloquist who toured England at the end of the 18th century and first few years of the 19th century. The above advertisement shows that there were performances in Hitchin and Baldock.
Steven Connor has published a book Dumbstruck, A Cultural History of Ventriloquism and there is a Dumbstruck Archive online which contains addition source information on Lee Sugg.
If you are interested in travelling entertainers in Hertfordshire see the Wells Pavillion Theatre Company.