A leading contemporary member of the Society of Friends offers here a thorough study of the life and writings of one of the most influential and respected members of that movement. Contemporary of George Fox and William Penn, and scarcely less influential in shaping the life and doctrine of Quakers than Fox himself, Barclay has been much neglected. The publication of Quaker journals and of studies and biographies of the movement's founder and successors have been abundant. But Barclay himself has been accessible only in occasional editions of some of his works. Dr. Trueblood writes this careful exposition of Barclay's work out of thirty years of researches which included almost mystery-story episodes of finding and deciphering Barclay's own notebooks and diary. A scholar of considerable ability, Barclay lived to see the Quakers gain freedom and recognition for their ""principles,"" and his own works substantially published. Nor were his admirers confined to fellow Quakers. Voltaire was among their number. This volume will be of importance to members and friends of the Quakers, to church historians, and to a considerable audience of those looking into past experience for clues to religious life today.