Townsend waved his hand significantly. Sir James rose and unlocked a safe from which he produced an envelope with some fibrous brown strands in it. These he placed under a powerful microscope. "Now, these I took from the throat of the poor fellow who was killed at Streatham," he explained. "I was rather bored by the case when you called me in first, and even up to the time I gave my evidence at the inquest. After the inquest was over I examined the body over again, and I confess that my interest increased as I proceeded. After what you have just told me I am completely fascinated. I made a most careful examination of the dead man’s neck once, and had discovered that he had died of strangulation, and bit by bit I collected these. They are fibres of the rope with which the crime was done." Townsend nodded so far as Sir James had proved his case. "Have you done as much with the poor fellow at Sir Clement’s residence?" he asked. "No, but I shall do so in the morning. This is a curious sort of stuff, Townsend, and certainly not made in England. It is not rope or cord in our commercial sense of the word, but a strong Manilla twist of native fibre. Thus we are going to introduce a foreign element into the solution." Townsend smiled as he produced a little packet from his pocket and laid it on the table. "You are building up my theory for me, wonderfully, sir," he said. "I also have something of the same sort here, only I have more than you seem to have collected. Here is the same sort of fibre from Mr. Manfred’s collar-stud, so that he must have been strangled over his collar, which means a powerful pressure. I didn’t think it possible for human hands to put a pressure like that, but there it is." "My word, we’ve got a powerful assassin to look for!" Sir James exclaimed. "Like you, I should not have deemed it possible. Did you find all that on Manfred’s collar-stud?" "Not all of it, sir. The collar-stud was bent up as if it had been a bit of tinfoil. But I found the bulk of this under the dead man’s finger-nails. They are long nails, and doubtless in the agony of strangulation they clutched frantically at the cord. I am quite sure that you will find this fibre to be identical with that which you took from the neck of the Streatham victim." "And this caretaker you speak of. Is he a respectable man? Silverthorne you said his name was, I fancy." "That’s the man, sir. He has been in his present employ for one-and-twenty years, a hard-working, saving man, with a big family. Oh, I should take his word for most things that he told me!"