I shall be back before that. If I can be of any service, as commercial traveller, perhaps you will let me know between this and then. You will send me written instructions? My best thanks. I shall be most anxious for your answer from Neuchatel. Who knows? It may be a mistake, my dear friend, after all. Courage! courage! courage!" He had entered the room with no appearance of being pressed for time. He now snatched up his hat, and took his leave with the air of a man who had not another moment to lose.

Left by himself, Vendale took a turn thoughtfully in the room.

His previous impression of Obenreizer was shaken by what he had heard and seen at the interview which had just taken place. He was disposed, for the first time, to doubt whether, in this case, he had not been a little hasty and hard in his judgment on another man. Obenreizer's surprise and regret, on hearing the news from Neuchatel, bore the plainest marks of being honestly felt--not politely assumed for the occasion. With troubles of his own to encounter, suffering, to all appearance, from the first insidious attack of a serious illness, he had looked and spoken like a man who really deplored the disaster that had fallen on his friend. Hitherto Vendale had tried vainly to alter his first opinion of Marguerite's guardian, for Marguerite's sake. All the generous instincts in his nature now combined together and shook the evidence which had seemed unanswerable up to this time. "Who knows?" he thought. "I may have read that man's face wrongly, after all."

The time passed--the happy evenings with Marguerite came and went. It was again the tenth morning since Vendale had written to the Swiss firm; and again the answer appeared on his desk with the other letters of the day

"Dear Sir. My senior partner, M. Defresnier, has been called away, by urgent business, to Milan. In his absence (and with his full concurrence and authority), I now write to you again on the subject of the missing five hundred pounds.

"Your discovery that the forged receipt is executed upon one of our numbered and printed forms has caused inexpressible surprise and distress to my partner and to myself. At the time when your remittance was stolen, but three keys were in existence opening the strong-box in which our receipt-forms are invariably kept. My partner had one key; I had the other. The third was in the possession of a gentleman who, at that period, occupied a position of trust in our house. We should as soon have thought of suspecting one of ourselves as of suspecting this person. Suspicion now points at him, nevertheless. I cannot prevail on myself to inform you who the person is, so long as there is the shadow of a chance that he may come innocently out of the inquiry which must now be instituted. Forgive my silence; the motive of it is good.

"The form our investigation must now take is simple enough. The handwriting of your receipt must be compared, by competent persons whom we have at our disposal, with certain specimens of handwriting in our possession. I cannot send you the specimens for business reasons, which, when you hear them, you are sure to approve. I must beg you to send me the receipt to Neuchatel--and, in making this request, I must accompany it by a word of necessary warning.

"If the person, at whom suspicion now points, really proves to be the person who has committed this forger and theft, I have reason to fear that circumstances may have already put him on his guard. The only evidence against him is the evidence in your hands, and he will move heaven and earth to obtain and destroy it. I strongly urge you not to trust the receipt to the post. Send it to me, without loss of time, by a private hand, and choose nobody for your messenger but a person long established in your own employment, accustomed to travelling, capable of speaking French; a man of courage, a man of honesty, and, above all things, a man who can be trusted to let no stranger scrape acquaintance with him on the route. Tell no one-- absolutely no one--but your messenger of the turn this matter has now taken. The safe transit of the receipt may depend on your interpreting LITERALLY the advice which I give you at the end of this letter.

"I have only to add that every possible saving of time is now of the last importance. More than one of our receipt-forms is missing--and it is impossible to say what new frauds may not be committed if we fail to lay our hands on the thief.

Your faithful servant ROLLAND, (Signing for Defresnier and Cie.)

Who was the suspected man? In Vendale's position, it seemed useless to inquire.

Who was to be sent to Neuchatel with the receipt? Men of courage and men of honesty were to be had at Cripple Corner for the asking. But where was the man who was accustomed to foreign travelling, who could speak the French language, and who could be really relied on to let no stranger scrape acquaintance with him on his route? There was but one man at hand who combined all those requisites in his own person, and that man was Vendale himself.

It was a sacrifice to leave his business; it was a greater sacrifice to leave Marguerite. But a matter of five hundred pounds was involved in the pending inquiry; and a literal interpretation of M. Rolland's advice was insisted on in terms which there was no trifling with. The more Vendale thought of it, the more plainly the necessity faced him, and said, "Go!"

As he locked up the letter with the receipt, the association of ideas reminded him of Obenreizer. A guess at the identity of the suspected man looked more possible now. Obenreizer might know.

The thought had barely passed through his mind, when the door opened, and Obenreizer entered the room.

"They told me at Soho Square you were expected back last night," said Vendale, greeting him. "Have you done well in the country? Are you better?"

A thousand thanks. Obenreizer had done admirably well; Obenreizer was infinitely better. And now, what news? Any letter from Neuchatel?

"A very strange letter," answered Vendale. "The matter has taken a new turn, and the letter insists--without excepting anybody--on my keeping our next proceedings a profound secret."

"Without excepting anybody?" repeated Obenreizer. As he said the words, he walked away again, thoughtfully, to the window at the other end of the room, looked out for a moment, and suddenly came back to Vendale. "Surely they must have forgotten?" he resumed, "or they would have excepted me?"

"It is Monsieur Rolland who writes," said Vendale. "And, as you say, he must certainly have forgotten. That view of the matter quite escaped me. I was just wishing I had you to consult, when you came into the room. And here I am tried by a formal prohibition, which cannot possibly have been intended to include you. How very annoying!"

Obenreizer's filmy eyes fixed on Vendale attentively.

"Perhaps it is more than annoying!" he said. "I came this morning not only to hear the news, but to offer myself as messenger, negotiator--what you will.