 But he received a patent from the Crown in April 1675, allowing him as Lucasian professor to retain his fellowship without being required to take holy orders.This must have relieved Newton's financial worries since in November 1676 he donated £40 towards the building of the new library of Trinity College.It is supposed that it was at Woolsthorpe in the summer of 1666 that Newton's thoughts were directed to the subject of gravity.