The contrast between the graphic power displayed by Dickens in his delineation of the characters of Bob Sawyer and Ben Allen, and the indistinctiveness, as to profession, of his presentments of Allan Woodcourt and Dr. Jeddler, may help us to understand the causes which render his doctors so much less effective than his lawyers. The legal profession presents more variety than the medical, and comes before us more prominently in conjunction with incidents of a striking character, as may be seen every day in the newspaper records of the courts of law and of police. The physician and the surgeon stand as much apart, in these respects, from the busy barrister or solicitor as the clergy do. Dickens has not given us a clerical portrait, and probably for a similar reason. Mrs. Oliphant, on the other hand, excels in her delineations of every grade of the Anglican hierarchy; but her genius as a writer of fiction runs in a groove essentially different from that of Dickens. Famous Literary Doctors. BY CUMING WALTERS. Medical men have not so commonly made literature an extra pursuit, or adopted it as a serious calling, as have the members of the other liberal professions. It is quite expected that a clergyman should write poems, philosophical essays, and perhaps even a novel with a purpose; and it is usual to recruit the ranks of critics extensively from the law, and to trust to briefless barristers for a continuous supply of romances. No detail is more frequently discovered in the biographies of eminent authors than that they were called to the Bar, and either never practised or forsook practising in order to engage in literary labours. Indeed, it might almost seem that failure in law was the most important step towards success in authorship. No such rule applies, however, to medical men, and no such comment would be justified in their case. Not only do we find the writing of books--otherwise than text-books and technical treatises--rarer with them, but it curiously happens that in most instances it has been the successful practitioner, not the man walking the hospitals or waiting for calls, who has turned author. And we shall find that these medico-literati (if I may coin the phrase) have often been among the most hard-working in their profession, and the wonder is that they were able to enter upon a second pursuit and to follow it with so much zeal. For, in most of the examples I shall advance, literature was more than a pastime with these men who indulged in it. It was chosen by some for its lucrativeness, and by the majority for its capacity to enhance their reputation or to bring them enduring fame. This much may be safely said, that the names of many excellent doctors would have faded from public remembrance ere this, and would have passed away with the generation to which they belonged, had not literature given them lasting luminance. In not a few instances the fact is already forgotten or wholly