"He may to-morrow morning," said Ferris, quickly. "I think he is too exhausted to-night to remember much more. His memory has been severely taxed to-day, you know. I shall speak to him to-morrow, and whatever he tells me I shall tell you, Mr. Gebb." "Very well," replied Gebb, dubiously, and walked briskly to the railway station, as he was anxious to reach London, to see Parge and tell him what he had discovered. Also, he desired the advice of Parge regarding the jewels, for despite Arthur's promise, he did not trust him altogether. The young man had deceived him before, and should occasion arise might do so again. So Gebb determined to act independently of anything which might be said by Dean in the morning. He was surrounded on all sides by people who, with their own ends to gain, were more or less unscrupulous, so it behoved him to be wary. Otherwise, he would never pluck out the heart of this mystery. On arriving in town Gebb went to his office, and there found three letters for him. Two, from the station-master and the ticket-clerk of Norminster Station, were corroborative of Dean's visit to town on the evening of the twenty-fourth of July; for both stated that Mad Martin, the gardener of Kirkstone Hall, had purchased a return ticket, and had left for London by the five o'clock train. But knowing what he did, this evidence came too late to enlighten Gebb in any degree, so he tossed the letters aside and opened the third one. It proved to be from Parge, requesting him to call and see him at once on important business concerning the Grangebury murder case, these latter words being underlined. "He has found out something," thought Gebb. "I wonder what it is? another mare's-nest, I expect. However, we'll see. I'll call to-morrow." At ten o'clock next morning he was in Pimlico, and in the presence of Mr. Parge, who received him with a look of subdued triumph. "Well, Absalom," said he, "have you discovered who killed Miss Gilmar?" "No, I haven't, Simon; have you?" "Yes. I found out the truth from--who do you think?" "I don't know," said Gebb, impatiently. "Mrs. Presk, perhaps." "No, not from the mistress, but from the maid--Matilda Crane." Gebb looked at the ex-detective in amazement. "Why, what did she know about it?" "She knew who visited Miss Gilmar on the night of the murder. I said you had not examined that girl properly, Absalom, so I sent for her to put a few questions myself. Then I discovered that she had found, cast into the grate among other papers, a letter written by the assassin to Miss Gilmar. Here it is." Gebb took the bit of paper handed to him, and read as follows:-- "Dear Miss Gilmar, "I wish to see you on the evening of the 24th July, between nine and ten o'clock, about some information touching Dean. Get rid of every one in the house at that time, and expect me for certain. It will be better for us to be alone. Burn this. "Yours truly, "John Alder."