The demand of this busy age is for small books, containing the pith and marrow of important subjects. As regards my subject, I have endeavoured to meet this demand. I hope that the volume supplies at once sketches of three leaders in early Quaker history, and an informal manual of the rise and tenets of the Society. A few years ago, I was led to re-examine the journal of George Fox, and I was surprised to find him an evangelist of a rare order, with a heart burning and throbbing with pity for sinners and with zeal for the Master. His ardent nature was laid hold of by the gospel in its fulness, and the result was a spirituality at once delicate and strong. The same features attracted me in William Penn. He also had many of the gifts of the evangelist. He could collect and hold a crowd almost as well as Fox, and preach them as full a gospel. If other schemes had not claimed so large a share of his life, I think he might have done an evangelistic work equal to that done by George Fox. Robert Barclay deserves to be highly honoured as one who truly devoted his all to Christ. And he had much to devote--an honoured name and titled connections, rare intellectual gifts and great acquirements, social position and wealth. Yet if I understand his life aright, there was no half-heartedness in his decision. But I miss in him that glowing and vigorous assertion of gospel truths which delights us in the pages of Fox and Penn. The pungent and arousing appeals which stud like gems the writings of his two brethren are not to be found in his pages. Silent waiting on God is urged, entire self-surrender to God on the part of the Christian is insisted on with great earnestness. But the reader will look in vain, even in passages which seem to invite them, for earnest calls to repentance or to diligent service of the gospel of Christ. The Quakerism of the eighteenth century followed Barclay. The work of Fox was dropped. No one continued his vigorous aggression, but repression of activity was advocated openly. To this I venture to trace the decline of the Society in those days. In the Quakerism of to-day, I think I see Fox's spirit, and I would fain help the healthy reaction, however feebly, by these sketches. I hope they will also introduce to some Christians of other denominations three beautiful examples of spiritual-mindedness. In the preparation of the sketches of Penn and Barclay, I have had access to numerous unpublished letters in the keeping of a member of the Barclay family. For these I desire to express my warmest thanks. I have used them sparingly. A list of those from which I give extracts will be found on the next page. To the best of my knowledge these extracts have not been printed before.