"The victim of the fraud was as anxious as myself to avoid a public scandal, and it was arranged that nothing should be done for a year, to give time to McConachan to refund the money; if, however, he failed to do so within that time, there would be nothing for it but to make the matter public. These terms were agreed on and McConachan was told to send in his papers at once.
"The year allowed is now drawing to a close, and the money has not been forthcoming, so that there is no doubt that Mark McConachan's need of obtaining a large amount is extremely pressing. My knowledge of his character obliges me to add that I consider him one of the few men I ever knew whom I could imagine going to almost any length to provide himself with what he so urgently requires.
"Please consider this letter confidential unless you obtain actual proof of his guilt.--I am, sir, yours faithfully, "T. G. URSFORD, "Colonel commanding 31st Lancers."
Gimblet put the letter away with the other items of evidence of Mark's guilt: the telegram from the analyst in Edinburgh, the measurements of the footprints on the rose-bed, and of those other marks near the hedge by which he had at first been mystified. It was another thread in the thin cord that, like the silken line Ariadne gave to Theseus, had led him to come successfully out of the bewildering labyrinth into which the investigation of the crime had beguiled him.