Knowl.. took the place of the low word Penny.  Works of this convenient stamp, easily obtained and well nourished with matter, are felt to be like rich but unfashionable relations who are visited and received in privacy, and whose capital is used or inherited without any ostentatious insistance on their names and places of abode.  As to memory, it is known that this frail faculty naturally lets drop the facts which are less flattering to our self-love—­when it does not retain them carefully as subjects not to be approached, marshy spots with a warning flag over them.  But it is always interesting to bring forward eminent names, such as Patricius or Scaliger, Euler or Lagrange, Bopp or Humboldt.  To know exactly what has been drawn from them is erudition and heightens our own influence, which seems advantageous to mankind; whereas to cite an author whose ideas may pass as higher currency under our own signature can have no object except the contradictory one of throwing the illumination over his figure when it is important to be seen oneself.  All these reasons must weigh considerably with those speculative persons who have to ask themselves whether or not Universal Utilitarianism requires that in the particular instance before them they should injure a man who has been of service to them, and rob a fellow-workman of the credit which is due to him.

After all, however, it must be admitted that hardly any accusation is more difficult to prove, and more liable to be false, than that of a plagiarism which is the conscious theft of ideas and deliberate reproduction of them as original.  The arguments on the side of acquittal are obvious and strong:—­the inevitable coincidences of contemporary thinking; and our continual experience of finding notions turning up in our minds without any label on them to tell us whence they came; so that if we are in the habit of expecting much from our own capacity we accept them at once as a new inspiration.  Then, in relation to the elder authors, there is the difficulty first of learning and then of remembering exactly what has been wrought into the backward tapestry of the world’s history, together with the fact that ideas acquired long ago reappear as the sequence of an awakened interest or a line of inquiry which is really new in us, whence it is conceivable that if we were ancients some of us might be offering grateful hecatombs by mistake, and proving our honesty in a ruinously expensive manner.  On the other hand, the evidence on which plagiarism is concluded is often of a kind which, though much trusted in questions of erudition and historical criticism, is apt to lead us injuriously astray in our daily judgments, especially of the resentful, condemnatory sort.  How Pythagoras came by his ideas, whether St Paul was acquainted with all the Greek poets, what Tacitus must have known by hearsay and systematically ignored, are points on which a false persuasion of knowledge is less damaging to justice and charity than an erroneous