Complex sentence: Some of Reeve's pieces were revived at the patent theatres after the Royalty closed in 1788: the ballet-pantomime "Don Juan" (1787), for example, proved particularly successful, and both Drury Lane and Covent Garden adopted it for their repertories.
Split into simpler sentences: Some of Reeve's pieces were revived at the patent theatres after the Royalty closed in 1788. Most notably, his ballet-pantomime "Don Juan" (1787) was incredibly popular and both Drury Lane and Covent Garden adopted it for their repertories.