"Mr. Gladstone's views as to the proper method of dealing with grave and difficult scientific and religious problems had permitted him to base a solemn 'plea for a revelation of truth from God' upon an error as to a matter of fact, from which the intelligent perusal of a manual of palæontology would have saved him.... He does, indeed, make a great parade of authorities, and I have the greatest respect for those authorities whom Mr. Gladstone mentions. If he will get them to sign a joint memorial to the effect that our present palæontological evidence proves that birds appeared before the 'land population' of terrestrial reptiles, I shall think it my duty to reconsider my position--but not till then.... I have every respect for the singer of the Song of the Three Children (whoever he may have been); I desire to cast no shadow of doubt upon, but, on the contrary, marvel at, the exactness of Mr. Gladstone's information as to the considerations which 'affected the method of the Mosaic writer'; nor do I venture to doubt that the inconvenient intrusion of these contemptible reptiles--'a family fallen from greatness,' a miserable, decayed aristocracy reduced to mere 'skulkers about the earth,' in consequence, apparently, of difficulties about the occupation of land arising out of the earth-hunger of their former serfs, the mammals--into an apologetic argument, which would otherwise run quite smoothly, is in every way to be deprecated. Still, the wretched creatures stand there, importunately demanding notice; and, however different may be the practice in that contentious atmosphere with which Mr. Gladstone expresses and laments his familiarity, in the atmosphere of science it really is of no avail whatever to shut one's eyes to facts, or to try and bury them out of sight under a tumulus of rhetoric.... However reprehensible, and, indeed, contemptible, terrestrial reptiles may be, the only question which appears to me to be relevant to my argument is whether these creatures are or are not comprised under the denomination of 'everything that creepeth upon the ground.'... Hence I commend the following extract from the eleventh chapter of Leviticus to Mr. Gladstone's serious attention:-- And these are they which are unclean unto you among the creeping things that creep upon the earth: the weasel, and the mouse, and the great lizard after its kind, and the gecko, and the land-crocodile, and the sand-lizard, and the chameleon. These are they which are unclean to you among all that creep (v. 29-31).