In 1865–66, Gilbert collaborated with Charles Millward on several pantomimes, including one called "Hush-a-Bye, Baby, On the Tree Top, or, Harlequin Fortunia, King Frog of Frog Island, and the Magic Toys of Lowther Arcade" (1866). Gilbert's first solo success came a few days after "Hush-a-Bye Baby" premiered. His friend and mentor, Tom Robertson, was asked to write a pantomime but did not think he could do it in the two weeks available, and so he recommended Gilbert instead. Written and rushed to the stage in 10 days, "Dulcamara, or the Little Duck and the Great Quack", a burlesque of Gaetano Donizetti's "L'elisir d'amore", proved extremely popular. This led to a long series of further Gilbert opera burlesques, pantomimes and farces, full of awful puns (traditional in burlesques of the period), though showing, at times, signs of the satire that would later be a defining part of Gilbert's work. For instance: