He joined the Army in 1818 as a cornet, was promoted lieutenant in 1821, captain in 1823 and half-pay major in 1826.
Knight made a single first-class appearance for Sussex, in 1827, against Kent.
In the twelve-a-side match, Knight finished on 3 not out in the first innings, and did not bat in the second.
His brothers, George Thomas, Edward and Brook and nephews Philip and Gerald Portal all played first-class cricket.
After Sophia's death, he married Charlotte Northey,[2][3] with whom he had a daughter.