Complex sentence: After attending a school at Ambleside he returned to London, where he found employment as a postman; but about 1760 he went on the stage in the provinces, and some three years later began to appear in minor parts at Covent Garden Theatre.
Split into simpler sentences: After attending a school at Ambleside he returned to London, where he found employment as a postman. In about 1760 he went on the stage in the provinces, and some three years later began to appear in minor parts at Covent Garden Theatre.