"Is it consistent that the two telegrams were sent to different addresses? They would have been either both sent to the moat-house, or both sent to his London flat--that is, if they were sent by the War Office. Only a relative or a personal friend would take the trouble to send to different addresses. There lies the weak point of Nepcote's statement." "By Jove, there is a point in that," said Caldew, in a startled tone. "But these are facts which can be ascertained," he added, as though seeking to reassure himself. "They can be ascertained too late. I have already set inquiries on foot, but it takes some time to gain any information about official telegrams. Nepcote has plenty of time to take advantage of Merrington's blunder, if there is any occasion for him to do so. No matter what his explanation is, the fact remains that he was in England, and not in France, on the night the murder was committed, and I propose to find out how he spent the time. But it is of the first importance to find out what has become of the missing necklace, which is the really important clue. Is Scotland Yard making any investigations about it?" "Yes. Merrington has put me on to that because I let you score the point over him of discovering that it was missing. I am sure that he hopes I will fall down over the job of tracing it. I shouldn't be surprised if I did, too. It's no easy thing to get on the track of missing jewellery, especially if it has been hidden. I have not even got a description of the necklace to help me." "I can give you a description, and perhaps help you in the work of tracing it." "Can you? That's awfully good of you." Caldew's face showed that he meant his words. "Have you any idea where it is?" "I have at least something to guide me in commencing the search--something, which, curiously enough, I owe to Merrington's blunder in visiting Nepcote before he looked for the necklace. We will go across to Hatton Garden, and I will put my idea to the test." CHAPTER XXI On reaching the street, they crossed Ludgate Circus, and directed their steps towards Hatton Garden by way of St. Bride Street. A few minutes later, they emerged in that portion of Holborn which is graced by the mounted statue of a dead German prince acknowledging his lifelong obligations to British hospitality by raising his plumed hat to the London City & Midland Bank on the Viaduct corner. Hatton Garden, as every Londoner knows, begins on the other side of this improving spectacle--a short broad street which disdains to indicate by external opulence the wealth hidden within its walls, though, to an eye practised in London ways, there is a comforting suggestion of prosperity in its wide flagged pavements, comfortable brick buildings, and Jewish names which appear in gilt lettering on plate-glass windows.