_Mrs. Catherine Barton._--In Brewster's _Life of Sir Isaac Newton_, p.
250., is the following passage:
"This accomplished nobleman was created Earl of Halifax in 1700, and
after the death of his first wife he conceived a strong attachment for
Mrs. Catherine Barton, the widow of Colonel Barton, and the niece of
Newton."
I wish particularly to know the _maiden_ name of this Catherine Barton; she
married Mr. Conduitt, who succeeded Sir I. Newton as Master of the Mint.