[11] Warren left Hayes' establishment to become the mistress of Charles Greville,[12] who commissioned Reynold to paint her as Thaïs.

[11][13] In 1778 she left Grenville[12] to be "kept" by Hickey's friend, Captain Robert (Bob) Pott of the East India Company.

[2] To support his view that Warren was 'perfection', Hickey sought the opinion of Reynolds, "whom all the world allowed to be a competent judge" of beauty.

Reynolds "declared every limb of hers perfect symmetry, and altogether he had never seen so faultless and finely formed a human figure.

Potts commissioned an architect, Edoardo Tiretta, to construct a mausoleum for her over the grave at a cost of £3,000 and a column for an additional £1,000.