"MY DEAR SIR," it ran, "I have sent you a wire in answer to your letter received to-day, since in view of what you say I see that it is necessary to disclose what I hoped, for the sake of the regiment, to continue to keep secret. But if, as you tell me, the innocence and even the life of Sir David Southern is involved, and you have such good reason to consider McConachan the man guilty of his uncle's death, it becomes my duty to put aside my private feelings and to confess to you that I am unable to look upon Mark McConachan as entirely above suspicion. When he was a subaltern in the regiment I have the honour to command, he was a source of grave worry and trouble to me. "From the day he joined I had misgivings, and, though his good looks, lively spirits, and recklessness with money made him popular with others of his age, I soon discovered that his moral sense was practically nonexistent, and considered him a very undesirable addition to our ranks. Still, I hoped he might improve, and for a year or two nothing occurred to force me to take serious notice of his behaviour. Unknown to me, however, he took to gambling very heavily, and must have lost a great deal more than he could afford, for he appears to have got deep in the clutches of moneylenders long before I heard anything about it. So desperate did his financial affairs become, that shortly before he left the regiment he was actually driven to forging the name of a brother officer, a rich young man, with whom he was on very friendly terms. The large amount for which the cheque was drawn drew the attention of the bankers to it, and in spite of the extreme skill with which, I am told, the signature had been counterfeited, the forgery was detected, and the matter was brought before me. "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."