From the Author's Preface: VOLTAIRE'S visit to England was the most important incident in his life. He tells us so himself. Yet it is the one period of his extraordinary career which is passed over by his numberless biographers in almost complete silence. As Carlyle in his ' Frederick ' puts it: 'Mere inanity and darkness visible reign, in all his Biographies, over this period of his life, which was, above all others, worth investigating: seek t to kw it; man has inquired into it, probably competent man w ever will.' Carlyle's own account of Voltaire in England is full of mistakes. Later researches have done something to fill up this blank page in Voltaire's biography. Notable among these are Gustave Desiresterres' 'Voltaire et la Societe Francaise au XVIIIe Siecle;' and Mr. Churton Collins' very short Essay on Voltaire in England. As this little mograph is mainly biographical, quotation from Voltaire himself and from other writers is used more freely than would be in place in a critical work.