He further endowed it in 1434 with lands in Bedfordshire and Huntingdonshire, and his brothers, William and Robert, gave some houses in London in 1427 and 1438.
This stroke, which would most probably have given the victory to the king, was prevented by the "Eastern Association," a union of Norfolk, Suffolk, Essex, Cambridgeshire and Hertfordshire, constituted in December 1642 and augmented in 1643 by Huntingdonshire and Lincolnshire, of which Cromwell was the leading spirit.
Horne thereupon tried his fortune, but without success, on farming some land in Huntingdonshire.
On his return from Huntingdonshire he became once more a frequent guest at Mr Tooke's house at Purley, and in 1782 assumed the name of Horne Tooke.
He accepted the rectory of Elton in Huntingdonshire, but soon after went again to the continent, in order to study the methods of the Roman Catholic Church; and after a prolonged mental struggle he joined the Roman Catholic communion in November 1845.