Complex sentence: In 1583 the 3rd Earl of Sussex died childless, and was succeeded by his younger brother Henry Radclyffe as 4th Earl; during the ten years he held the earldom, Sussex's Men are known primarily through their provincial tours.
Split into simpler sentences: In 1583 the 3rd Earl of Sussex died childless, and was succeeded by his younger brother Henry Radclyffe as 4th Earl. During the ten years he held the earldom, Sussex's Men are known primarily through their provincial tours.