1911 Encyclopædia Britannica, Volume 6… (1911)
“ On the death of George, 3rd earl of Cumberland, in 1605, the barony of Clifford, separated from the earldom, was claimed by his daughter Anne, countess of Dorset, Pembroke and Montgomery; and in 1628 a new barony of Clifford was created in favour of Henry, afterwards 5th and last earl of Cumberland. After Anne’s death in 1676 the claim to the older barony passed to her daughter Margaret (d. 1676) , wife of John Tufton, 2nd earl of Thanet, and her descendants, whose title was definitely recognized in 1691. ”
