The life of Bruno has been written in English more than once, and he has had many excellent commentators. No one can now Write about him without availing himself very largely of the solid and scholarly work done by Tocco, Fio rentino, Berti, Brunnhofer, mcintyre and others. The apology for the appearance of the present work must be that some facts, unrecorded in England, have come to light of late years, and also that a few usual, almost unavoidable in accuracies require correction. Moreover, I have tried to follow the development of Bruno's thoughts in the order in which he declared them; and, on one or two points, I find myself compelled to difi'er from the conclusions of this or the other commentator.