"There is more than that in it. There's the question of the revolver. Of course you are aware that he identified the revolver with which his wife was shot as the property of Captain Nepcote, a guest at the moat-house who left on the afternoon of the day on which Mrs. Heredith was murdered. Heredith does not accept your theory of the way in which Hazel Rath is supposed to have obtained the revolver. He does not think that Nepcote left the revolver behind him at the moat-house. He told Caldew this, but Caldew said the ownership of the revolver was a matter of no consequence." "Caldew's a fool if he said that, and I wish I'd never allowed him to meddle in the case," replied Merrington forcibly. "I've had the police court proceedings against the girl put back for a week till the question of the ownership of the revolver could be settled. Now that it is decided I shall have Nepcote interviewed and questioned without delay." "Before you try to trace the missing necklace?" The faint inflection of surprise in Colwyn's voice might have escaped a quicker ear than Merrington's. "Scotland Yard will trace the necklace fast enough," he confidently declared. "I like to take things in their proper order. The next thing to do is to ascertain whether Nepcote left his revolver behind him at the moat-house, though I have not the least doubt that he did. The necklace is really a minor consideration. It merely provides another motive for the murder--cupidity as well as jealousy." "Is that the way you regard it?" A less thick-skinned man than Merrington would this time have caught something more than surprise in the other's tone. "Is there any other way of looking at it?" "I would not like to venture an opinion in this case without more knowledge than I have at present," returned Colwyn in sober accents. "But so far as I have gone into it I should say that there are several things which seem to require more explanation. Nepcote's own actions seem to call for some investigation." "You are surely not suggesting that Nepcote had anything to do with the murder or the robbery of the pearls?" said Merrington in an astonished voice. "That is quite impossible. He left the moat-house in the afternoon before the murder was committed, and went over to France that night." "He didn't go to France that night. He stayed in London, and did not return to France until the following day." Merrington was obviously startled at this unexpected information. "This is news to me," he said gravely. "Where did you learn it?" "From the War Office this morning. There is no possibility of mistake. Nepcote was in London on the night of the murder." "He probably has an explanation, but what you have just told me is an additional reason for seeing and questioning Nepcote without delay, even if I have to send a man to France for the job."