"I see, Sir Roger," he said, "that you are correct, as far as the dating of this note goes; but at the same time, I can assure you, I must have dated it wrong at the time by some unfortunate mistake, which mistake, by an unpleasant concatenation of circumstances, might prove of the greatest disadvantage to me at present, and might even deprive me of the power of assisting you in the way that I am so desirous of doing."

The master-key of self-interest instantly unlocked the door of Sir Roger Millington's understanding; and he now saw that some very strong motive must influence the peer in wishing to prove that the letter was written on a different day from that on which it was dated. He consequently determined at once that it should be written on any day whatsoever that his lordship thought fit; but, at the same time, having a due regard to the friable nature of promises, he extremely desired to make himself master of his noble friend's secret views, in order to have some check upon him hereafter. "Indeed, my lord," he replied, in a tone of much concern, "I am sorry to hear that the fact should be likely to produce such results. May I inquire how such an unfortunate state of things is likely to ensue from so simple a circumstance?"

"Oh, certainly," replied Lord Dewry, with somewhat of a sarcastic smile; "you may inquire, and I will answer you, Sir Roger: but then, if I do, I must, I am afraid, demand a bond for the two hundred and fifty pounds I am about to advance, as I must either have security for my money or my secrets--which you like, Sir Roger."

"Oh, then, my lord," replied Sir Roger Millington, inclining his head with a significant bow, "the matter is very simple. As I have no security to offer for the money, I will beg not to burden myself with your lordship's confidence any further than you think absolutely necessary; and in regard to the note which is likely to produce results so unlucky to both you and me--for I am fain to believe that my prosperity is now intimately connected with your lordship's--I think the best way to settle the matter will be to put it in the fire."

"I do not exactly know that," answered Lord Dewry, musing: "at all events, let me convince you first that it was written on the eighteenth, instead of the nineteenth."

"My lord, I am already convinced," said Sir Roger Millington, who, once having obtained the cue, could go on without the prompter--"I am already convinced: I see my mistake. I remember it was the day before the great walking bet came off, which was on the nineteenth, at Hounslow. Indeed, it is impossible that it could have been otherwise: for I was present on the ground all day; and if I was at Hounslow all day, I could not receive your note in London."

"True, true," said the peer; though he very well knew that the note which he had written after his return to town, the very day subsequent to his brother's death, had found Sir Roger just come back from Hounslow--"true, true, Sir Roger; and doubtless you could swear to all these facts, should it be necessary."

"Beyond all doubt, my lord," replied the knight, "circumstances crowd upon my memory which all tend to show that your lordship is right; and it must have been the mistaken date of the note which deceived me."

"Would it not, then, be advisable," demanded the peer, "to rectify the date which the note bears, instead of destroying it--hey, Sir Roger, hey?"

"Certainly, my lord, certainly," said Sir Roger; and then, dropping his voice, he added in a half-whisper, "if it can be done without the chance of discovery."