Xavier Boniface Saintine (10 July 1798 - 21 January 1865) was a French dramatist and novelist.He produced many other novels, none of striking individuality with the exception of Seul (1857), which purported to be the authentic record of Alexander Selkirk on his desert island. Saintine was a prolific dramatist, and collaborated in more than 200 pieces with Eugène Scribe and others, usually under the name of Xavier. He co-wrote the story which was to form the basis for Bellini's opera I puritani. He died in Paris in 1865.