He studied art and was on friendly terms with David Roberts and other leading artists of the period.
In 1848 Gritten went to the United States in Brooklyn and exhibited at the American Art Union (1850 to 1851) and the National Academy of Design (1850 to 1854).
In 1853 Gritten arrived in Australia, initially trying prospecting at the Bendigo goldfields, but soon resumed painting in Victoria and Tasmania.
A View of Hobart (1857) by Gritten hangs at the National Library of Australia at Canberra.
He died suddenly at Melbourne leaving a widow and four children in poor circumstances.