Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. The matter here rested until the autumn of 1894, when the publishers requested the present writer to take up the work where his revered friend had left it, and see the edition through the press. He has done this with some reluctance, conscious that he approached the task with a less intimate knowledge of the subject than his predecessor; nevertheless he was unwilling that Dr. Dra per's notes on the early pages should be lost, and has deemed it a labor of love to complete the undertaking upon which the last thoughts of the latter fondly dwelt.