This shows an 1850s passenger Steamer. Dixons ran a service between Stockton and Middlesbrough for over 40 years until trams became popular. 
Picture Stockton Archive
A Pictorial History of Stockton-on-Tees
This shows an 1850s passenger Steamer. Dixons ran a service between Stockton and Middlesbrough for over 40 years until trams became popular.
Dixons also had a paddle steamer called “Prince of Wales”.She was built for the company by Pearse, Lockwood & Co.,Stockton-On-Tees, and launched in April 1862.
I believe the name “Citizen Q” may have been a newspaper type error.The Northern Echo of 4 August 1875 has an article concerning the passenger steamboat “Citizen” owned by Messrs. Dixon.The steamer was travelling the river and on reaching Blue house point it passed two men in a rowing boat shooting birds.The men didn`t see the “Citizen” approaching and carried on shooting covering passengers in a large quantity of spent shot.One man had no less than seven extracted from his neck.The article also refers to the problem of young boys throwing stones at the steamers and nude bathers!!
The company was owned by George & John Thomas Dixon who lived in Cleveland Row, Stockton. Although it is difficult to tell from this image the boat is probably one named the ‘Citizen Q’ (or Citizen). In August 1881 the Imperial Tramways Company took over two steamers, the ‘Citizen’ and the ‘Forget-Me-Not’ from messrs Dixon of Stockton.