Complex sentence: In August 1715 he joined the cabinet as Lord Privy Seal, and after a visit to George I in Hanover he secured in April 1717 the position of Secretary of State for the Northern Department.
Split into simpler sentences: In August 1715, he joined the cabinet as Lord Privy Seal. After a visit to George I in Hanover, he secured in April 1717 the position of Secretary of State for the Northern Department.