In 1863, the theatre closed for extensive alterations and improvements by C. J. Phipps, who was later the architect of the Savoy Theatre (1881), the Lyric Theatre, Shaftesbury Avenue (1888), Her Majesty's Theatre (1897) and many others. The capacity of the theatre was at this time 889. The Olympic reopened with performances of "The Girl I Left Behind Me" and "The Hidden Hand and My Wife's Bonnet" in November 1864. Burnand's contributions in the 1860s included "Fair Rosamond – The Maze, The Maid, and The Monarch; Deerfoot; Robin Hood – or, The Forrester's Fate!; Cupid and Psyche – or, Beautiful as a Butterfly; Acis and Galatæa – or, The Nimble Nymph and the Terrible Troglodyte!" and "King of the Merrows – or, The Prince and the Piper". Morton's plays included "Ticklish Times; A Husband to Order; A Regular Fix!;" and "Gotobed Tom!". In 1870, W. S. Gilbert became another of the theatre's notable authors, producing "The Princess". Later Gilbert plays at the Olympic were "The Ne'er-do-Weel" (1878) and "Gretchen" (1879).