Bruno published seven works in England. The first was "_Explicatio triginta Sigillorum_," the Thirty Seals thus explained being hints for acquiring, arranging and remembering all arts and sciences. To it was added his _Sigillus Sigillorum_ for comparing and explaining all mental operations. Then came an Italian dialogue "_La Cena de le Ceneri_" or Ash Wednesday Supper. This was written in praise and extension of the Copernican theory, indeed quite exceeding it in teaching the identity of matter, the infinity of the universe, the possibility of life on other spheres, with a painstaking attempt to show that these notions do not conflict with those of Mother Church. Next came "_De Causa, Principio et Uno_." (Cause, Principle and Unity). This treated of the immanence of spirit, the eternity of matter, the potential divinity of life, the origin of sin and death, and many other similar abstruse topics. It was followed by _De l'Infinito Universo ed Mondi_, with numerous reasons for believing the universe to be infinite and full of innumerable worlds, with the divine essence everywhere pervading. All these works appeared in 1583. In 1584 appeared his "_Spacio de la Bestia Triofante_" or Expulsion of the Triumphant Beast. In this prose poem Jupiter, repenting his errors, resolves to expel the many beasts that occupy his heavenly sphere--the constellations--and to substitute for them the virtues. In the council of the gods convened by him many subjects are discussed, among them the history of religions, the contrasts between natural and revealed religions and the fundamental forms of morality. In this allegory Jupiter represents of course the human spirit; the Bear, the Scorpion, etc., are the vices to be expelled. Unfortunately the book was quite generally regarded as attack upon the Church or the Pope, though what he really struck at was the credulity of mankind. It was dedicated to Sir Philip Sydney. Then came his "_Cabala del Cavallo Pegasio_" or Cabal, dedicated to a suppositious Bishop who was made to impersonate the spirit of ignorance and sloth. It is a mordant satire on Asinity, including credulity and unquestioning faith. After this he dedicated another work to Sidney. "_Degl' Heroici Furori_" (Enthusiasms of the Noble), a collection of sonnets with prose commentaries, like Dante's _Vita Nuova_, touching on the love for spiritual beauty arising from that for physical beauty attaining a climax in a sort of ecstasy by union with the divine. These sonnets possess a very high literary value aside from their other interest.