At the 1702 English general election, his nephew stood for King's Lynn and Walpole had the opportunity to stand for Castle Rising.
Walpole was becoming an increasing embarrassment to his nephew, who stood at Castle Rising instead of him at the 1710 British general election, but returned him at a by-election on 11 December 1710.
He wrote importuning letters to Harley, claiming to be an effective Tory agent in Norfolk and seeking some preferment.
He voted for the French commerce bill on 18 June 1713 and presented an address to the Queen from Norfolk congratulating her on the peace in August 1713.
[1] In view of the increased rent for Beckhall, Walpole purchased an estate at Broomthorpe, close to Holkham, for £2,200 in 1715 with an annuity of £60 for life.