[1][2] Louisa was the daughter of Colonel James Capper, an officer in the East India Company Army, and the author of philosophical and poetical works.
[2] A keen correspondent, he exchanged a number of letters on spiritual matters with his cousin John Sterling.
[1][8] These included two panels of the Adoring Saints by Lorenzo Monaco, presented to the National Gallery, London in 1848.
[12] The art historian Francis Haskell judged him "an exceptionally cultivated man" and "one of the most successful and discriminating... collectors of Old Masters in the nineteenth century".
[2] By 1847 he was living in Kemptown, Brighton and was chosen to contest the local parliamentary constituency at the general election of that year.