and higher, whether praise or blame, I know not how to give.  Nevertheless I would in the outset, and with the utmost sincerity, admit concerning Messrs. Wallace and Darwin that neither can be held as the more profound and conscientious thinker; neither can be put forward as the more ready to acknowledge obligation to the great writers on evolution who had preceded him, or to place his own developments in closer and more conspicuous historical connection with earlier thought upon the subject; neither is the more ready to welcome criticism and to state his opponent’s case in the most pointed and telling way in which it can be put; neither is the more quick to encourage new truth; neither is the more genial, generous adversary, or has the profounder horror of anything even approaching literary or scientific want of candour; both display the same inimitable power of putting their opinions forward in the way that shall best ensure their acceptance; both are equally unrivalled in the tact that tells them when silence will be golden, and when on the other hand a whole volume of facts may be advantageously brought forward.  Less than the foregoing tribute both to Messrs. Darwin and Wallace I will not, and more I cannot pay.

Let us now turn to the most authoritative exponent of latter-day evolution—­I mean to Mr. Wallace, whose work, entitled Darwinism, though it should have been entitled Wallaceism, is still so far Darwinistic that it develops the teaching of Mr. Darwin in the direction given to it by Mr. Darwin himself—­so far, indeed, as this can be ascertained at all—­and not in that of Lamarck.  Mr. Wallace tells us, on the first page of his preface, that he has no intention of dealing even in outline with the vast subject of evolution in general, and has only tried to give such an account of the theory of natural selection as may facilitate a clear conception of Darwin’s work.  How far he has succeeded is a point on which opinion will probably be divided.  Those who find Mr. Darwin’s works clear will also find no difficulty in understanding Mr. Wallace; those, on the other hand, who find Mr. Darwin puzzling are little likely to be less puzzled by Mr. Wallace.  He continues:—­

“The objections now made to Darwin’s theory apply solely to the particular means by which the change of species has been brought about, not to the fact of that change.”

But “Darwin’s theory”—­as Mr. Wallace has elsewhere proved that he understands—­has no reference “to the fact of that change”—­that is to say, to the fact that species have been modified in course of descent from other species.  This is no more Mr. Darwin’s theory than it is the reader’s or my own.  Darwin’s theory is concerned only with “the particular means by which the change of species has been brought about”; his contention being that this is mainly due to the natural survival of those individuals that have happened by some accident to be born most favourably adapted