'There can be no doubt whatever, ' said Mr. Phillipps, 'that my theory is the true one; these flints are prehistoric fish-hooks.''I dare say; but you know that in all probability the things were forged the other day with a door-key.''Stuff!' said Phillipps; 'I have some respect, Dyson, for your literary abilities, but your knowledge of ethnology is insignificant, or rather non-existent. These fish-hooks satisfy every test; they are perfectly genuine.''Possibly, but as I said just now, you go to work at the wrong end. You neglect the opportunities that confront you and await you, obvious, at every corner; you positively shrink from the chance of encountering primitive man in this whirling and mysterious city, and you pass the weary hours in your agreeable retirement of Red Lion Square fumbling with bits of flint, which are, as I said, in all probability, rank forgeries.'Phillipps took one of the little objects, and held it up in exasperation.'Look at that ridge, ' he said. 'Did you ever see such a ridge as that on a forgery