The estate of Stoughton Grange gave Keck a considerable interest at Leicester, and in 1765 he was returned unopposed. He voted against the repeal of the Stamp Act, 22 Feb. 1766; against Chatham on the land tax, 27 Feb. 1767; and for the nullum tempus bill, 17 Feb. 1768.
In July 1767 he had announced that he would not again contest Leicester,
He died v.p. 18 Feb. 1782.
