This is marginalia written on the blank page preceding The Fairy-Queen's title-page. It was presumably written by an owner of the libretto and discusses the opera's text and composer.
This is the title-page of the libretto, and it features two instances of marginalia that are of note. At the top, a presumed owner has written “Read May 6, 1706." Then, he or she adds that the writer of the opera was "Anonymous."