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!”