This volume contains a life of Mazzini and a study of his thought. It can hardly be said that any serious attempt has been made either in England or Italy to deal with either. Hence the present volume, however unequal to the subject, may have its use. The thirty years, which have passed since Mazzini's death, make it possible now to place him in his true perspective; and the author trusts that the supreme admiration, which he feels for Mazzini as a man, has not prevented him from viewing the politician with impartiality. There exists abundant matter to allow us to judge Mazzini's political work, and it is unlikely that anything yet to be published will seriously affect our estimate of it. For the personal side of Mazzini's life, the moment is not a very opportune one. Ten years ago it would have been possible to glean reminiscences from many, who are now silent. It has been the author's privilege, however, to obtain invaluable information from two of the very few persons now living, who knew Mazzini intimately. While it is nearly too late for personal reminiscences, it is too early to avail oneself fully of Mazzini's correspondence. A good many of his letters have indeed been published, and I have been able to use a good many unpublished ones, especially his correspondence with Mr and Mrs Peter Taylor, which I have found of the greatest value. But unfortunately only one volume has as yet appeared of the collected edition of his correspondence, and there are still probably many of his letters, which have yet to come to light in Italy. With regard to the study, which occupies the second part of this volume, the author is very sensible of his limitations in dealing with so vast and complex a system as Mazzini's ethical and political thought. It is his hope that he may do something to stimulate more competent writers to labour in a very fruitful field. He believes that the more Mazzini's thought is disentangled, the more its essential importance will appear.