One of only three extant twopenny Mulready stationery letters sent on 6 May 1840, introduced on that date along with the Penny Black, the world's first postage stamp, was sent to Tudor's daughter, Isabella, who lived at the house.
[5] His wife Julia Purvis survived him, and died at Kelston Knoll on 9 August 1890, in her 93rd year.
[8] The house was subsequently owned by Walter Combermere Lee Floyd, who had been Deputy Consulting Engineer to the Government of India for Railways.
He died on 31 March 1917,[9] and his widow, Cecilia Mary Louisa, continued to live in the house until her death on 24 December 1928.
[15] The occupants in 1964 were stated to be Mr. and Mrs. A. J. Miller[16] In the particulars from an estate agent when Kelston Knoll was offered for sale in 1990, it is described as a "small country estate" which had been in the same ownership for forty years, comprising 14 acres, including two walled gardens, nine acres of grazing land and a coach house with gardener's flat.