Page:The Ancient Stone Implements (1897).djvu/683

Rh The recognition of these marks of authenticity has in some cases induced forgers to re-work, and according to their view, improve, genuine but imperfect ancient implements; but the newly-chipped surfaces can always be recognized on washing the specimens. In France some attempts have been made to dis- colour the surface of flints by chemical means, but in the instances which have come under my notice, the process has not been very successful; for though the surface of a dark flint has been whitened, it has become rough and somewhat pitted. A more deceptive discoloration has sometimes been produced by leaving the forged implements for many months in a kitchen boiler, the hot water in which gradually dissolves away a small portion of the surface of the flint and thus changes its colour. In such cases the form will often reveal the hand of the forger. It may, however, be thought that, by dwelling too much on this subject, suggestions will be offered, of which the fraudulent skill of some future forger will avail himself; and I therefore return from this digression to the consideration of the antiquity of the flint implements from the River-drift.