This refers simply to "Mr Pitt. It is set in Sunderland and features the Lyceum, Lambton Street. The opening post refers to the Lyceum, London.
Query - a "Wm Pitt, age 30, Artist, English" sailed from Glasgow 28 Sep 1852 aboard the Birman for Melbourne (arrived 21 Jan 1853). Is this the William Pitt in question?
Gateshead Observer, 21 Aug 1852