Recent research into the sources of the philosophical ideas incorporated by Spenser in the Faerie Queene necessitates the re-raising of an old question, never satisfactorily answered: Did Spenser read Bruno? The external evidence—Bruno's residence in England during the years 1583-5, the London publication of his Italian works, the dedication of his Spaccio and his De gl' Heroici Furori to Sir Philip Sidney—has long rendered the supposition initially attractive. Moreover the community of Neoplatonic elements in Bruno and Spenser, together with a certain affinity between the theme of the cantos of Mutability and Bruno's Spaccio, added color to the hypothesis. But in the absence of more specific documentation the suggestion of Bruno's influence upon Spenser has properly retained the status of a mere possibility. It is the primary purpose of this paper to adduce certain further considerations which in my opinion lend a considerable weight of probability to an affirmative answer to the question. Secondarily, my object is to conduct a pacific polemic against Mr. Greenlaw's thesis that certain portions of the Faerie Queene are animated by a spirit of Lucretian scepticism at odds with that Christianized Neoplatonism which has commonly been recognized as Spenser's sole philosophy. My contention is that to a right reading there exists no such antithesis as that which Mr. Greenlaw finds between the main tenor of Spenser's philosophy and the philosophical implications of the passages in question, and that a means of reconciling their apparent incompatibility and saving Spenser from a charge of inconsistency too gross even for poetic license to condone, is the postulate of a Bruno influence.