THE ANCESTOR, A Quarterly Review of County and Family History, Heraldry and Antiquities, Number II, JULY 1902, LONDON, p 210
A-1V Bill (6 Feb. 1644) of Thomas Ashberrye of St. Martins in the fields, gent., and Elizabeth his wife and Thomas Cotton, Dorothy Cotton and Isabell Cotton, son and daughters of Sir John Cotton of Wooddytton, co. Cambridge, Knight, and of Dame Elizabeth his wife, and brother and sisters of the said Elizabeth Ashberrye.

Answer (19 April 1645) of Walter Pratt of Ditton, gent. Concerning money which the said Dame Elizabeth, dying fifteen years since, is said to have entrusted to the defendant for his children's benefit.
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Her brother, John Cotton, did not refer to her as his sister, Elizabeth deceased, as he did his brother Thomas.