the problem which are never imparted to the reader. Now, at present I am in the position of these same readers, for I hold in this hand several threads of one of the strangest cases which ever perplexed a man's brain, and yet I lack the one or two which are needful to complete my theory. But I'll have them, Watson, I'll have them!" His eyes kindled and a slight flush sprang into his thin cheeks. For an instant only. When I glanced again his face had resumed that red-Indian composure which had made so many regard him as a machine rather than a man.
"The problem presents features of interest," said he. "I may even say exceptional features of interest. I have already looked into the matter, and have come, as I think, within sight of my solution. If you could accompany me in that last step you might be of considerable service to me."
"I should be delighted."
"Could you go as far as Aldershot to-morrow?"
"I have no doubt Jackson would take my practice."
"Very good. I want to start by the 11.10 from Waterloo."
"That would give me time."
"Then, if you are not too sleepy, I will give you a sketch of what has happened, and of what remains to be done."
"I was sleepy before you came. I am quite wakeful now."
"I will compress the story as far as may be done without omitting anything vital to the case. It is conceivable that you may even have read some account of the matter. It is the supposed murder of Colonel Barclay, of the Royal Munsters, at Aldershot, which I am investigating."
"I have heard nothing of it."
"It has not excited much attention yet, except locally. The facts are only two days old. Briefly they are these:
"The Royal Munsters is, as you know, one of the most famous Irish regiments in the British army. It did wonders both in the Crimea and the Mutiny, and has since that time distinguished itself upon every possible occasion. It was
