 A fourth Act, the Petty Sessions Act 1849, proscribed the holding of petty sessions in "unsuitable" premises such as public houses, though it was delayed because the Bill's provisions as to salaries for magistrates' clerks and statutory scales for court fees proved unacceptable.Jervis was appointed Chief Justice of the Common Pleas, knighted and appointed a Privy Councillor.In 1854, he heard the case of "Talbot v. Laroche", a legal action pivotal to the history of photography.