Birth date estimated at two years before her husband's birth. Jane Roberts, daughter of Sir Walter Roberts, 6th Baronet of Glassenbury (1691–1745) and his wife Elizabeth Slaughter, only daughter and heiress of William Slaughter, of Rochester, county Kent. Jane Roberts died on 16 December 1778 without issue.
“Jane, his da. and eventually his sole h., m. 23 Oct. 1752, George (Beaucleark) 3d Duke of St. Albans, but d. s.p. Dec. 1788 and was bur. at Cranbrook. The manor of Glassenbury passed, under her will, to Thomas Roberts of the co. of Cork, her Grace being apparently under the impression that he was of her family, inasmuch as his great great grandfather, the Rev. Thomas Roberts, Chancellor of the diocese of Cork (d. 1664, aged about 74), was, in a pedigree (by Hawkins, Ulster, 22 June 1775), made identical with Thomas, 2d s. of the 1st Bart. The last mentioned Thomas, however, d. s.p. in 1644. Had such descent been proved, it would have carried with it the Baronetcy of 1611 and the right to the Coat of Arms borne by those Baronets. That pedigree, however, was rejected by the Heralds' College, a new Coat of Arms was granted to him, and the Grantee was cr. a Bart. 20 Sep. 1809, he being described as "of Glassenbury, co. Kent and Brightfieldson, co. Cork."”
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