– In August 1814 he served as a clerk for the then Hospital’s Secretary, Morris Lievesley, promoted to the position of Treasurer’s Clerk in 1828, and succeeded Lievesley and became the Secretary until 1872.
– In June 1828, Johanna Parker was married to John Brownlow and conceived of three daughters, Johanna, Mary, and Emma. They lived outside the Hospital at 11 Heathcote Street.
– John Brownlow set up a few writings bolstering the name of the Hospital against certain criticisms. Works including: Hans Sloane: A Tale Illustrating the History of the Foundling Hospital (1831); Memoranda; or, Chronicles of the Foundling Hospital (1847); and The History and Objects of the Foundling Hospital, with a Memoir of the Founder (1865).
– Daughter, Emma Brownlow, married to Donald King, who was 20 years her senior. She delineated lives of children at the Foundling Hospital in paintings.