Mrs. Glenarm had, it appeared, received an anonymous letter, on the first day of her arrival as guest at the house of a friend, residing in the neighborhood of Perth.  The letter warned her that there was an obstacle, of which she was herself probably not aware, in the way of her projected marriage with Mr. Geoffrey Delamayn.  That gentleman had seriously compromised himself with another lady; and the lady would oppose his marriage to Mrs. Glenarm, with proof in writing to produce in support of her claim.  The proof was contained in two letters exchanged between the parties, and signed by their names; and the correspondence was placed at Mrs. Glenarm’s disposal, on two conditions, as follows: 

First, that she should offer a sufficiently liberal price to induce the present possessor of the letters to part with them.  Secondly, that she should consent to adopt such a method of paying the money as should satisfy the person that he was in no danger of finding himself brought within reach of the law.  The answer to these two proposals was directed to be made through the medium of an advertisement in the local newspaper—­distinguished by this address, “To a Friend in the Dark.”

Certain turns of expression, and one or two mistakes in spelling, pointed to this insolent letter as being, in all probability, the production of a Scotchman, in the lower ranks of life.  Mrs. Glenarm had at once shown it to her nearest relative, Captain Newenden.  The captain had sought legal advice in Perth.  It had been decided, after due consideration, to insert the advertisement demanded, and to take measures to entrap the writer of the letter into revealing himself—­without, it is needless to add, allowing the fellow really to profit by his attempted act of extortion.

The cunning of the “Friend in the Dark” (whoever he might be) had, on trying the proposed experiment, proved to be more than a match for the lawyers.  He had successfully eluded not only the snare first set for him, but others subsequently laid.  A second, and a third, anonymous letter, one more impudent than the other had been received by Mrs. Glenarm, assuring that lady and the friends who were acting for her that they were only wasting time and raising the price which would be asked for the correspondence, by the course they were taking.  Captain Newenden had thereupon, in default of knowing what other course to pursue, appealed publicly to the city magistrates, and a reward had been offered, under the sanction of the municipal authorities, for the discovery of the man.  This proceeding also having proved quite fruitless, it was understood that the captain had arranged, with the concurrence of his English solicitors, to place the matter in the hands of an experienced officer of the London police.

Here, so far as the newspaper correspondent was aware, the affair rested for the present.