Crollalanza theory of Shakespeare authorship languages, claimed to have traced a Calvinist called Michelangelo Florio (the same name as the Elizabethan humanist John Florio's father, and likely related to their family) who was born in the Sicilian city of Messina on 23 April 1564, the same date as is commonly given for William Shakespeare's birth in Stratford. Iuvara's theories had emerged into broader public awareness in 2000, during a round-table discussion conducted at the Turin Book Fair that year. According to Juvara, the name "Shakespeare" was adopted as a pseudonym by this Michelangelo Florio, born in Messina in 1564 to a couple named Giovanni Florio
The Plays of William Shakespeare him with the income and recognition that he needed. However, a full edition of Shakespeare would require a publisher to make a large commitment of time and money, so Johnson decided to begin by focusing on a single play, "Macbeth". Johnson began work on "Macbeth" to provide a sample of what he thought could be achieved in a new edition of Shakespeare. He got much of his information while working on the "Harleian Catalogue", a catalogue of the collection of works and pamphlets owned by Robert Harley, 1st Earl of Oxford and Earl Mortimer. He published this work, along with