Date of birth "3 Nov 1767" per Christie, Ian, R., The Collected Works of Jeremy Bentham: Correspondence of Jeremy Bentham, Volume 3: January 1781 to October 1788, 2017 (first published 1971), p. 95, footnote 8 [1]. Her approximate year of birth is given in a contemporary letter from Jeremy Bentham to George Wilson, dated 24 Sept 1781: "Miss Fox is a little girl between 13 and 14, a sister, and the only one, of the present Lord Holland who is about 9, consequently niece to Charles Fox and to Lady Shelburne and great-niece to the Duchess of Bedford" (Christie, p. 95)
british-history.ac.uk
'The Holland estate: Since 1874', in Survey of London: Volume 37, Northern Kensington, ed. F H W Sheppard (London, 1973), pp. 126–150, quoting source "Endowed Charities (London), vol. iv, 1901, pp. 471–2; M. L. R. 1841/3/832."[3]
spectator.co.uk
archive.spectator.co.uk
For the date of her death see: The Spectator, 15 March 1845, p. 253 [2] "On the 12th (March 1845) at Little Holland House, Kensington, the Hon. Caroline Fox, niece of Charles James Fox and sister of the late Lord Holland"