Over this letter, Mat meditated long before he quietly cast it away among the rest. When he had at last thrown it from him there remained only three more to examine. They proved to be notes of no consequence, and had been evidently written at an earlier period than the letters he had just read. After hastily looking them over, he searched carefully all through the box, but no papers, of any sort remained in it. That hurried letter, with its abrupt announcement of the writer’s departure from England, was the latest in date--the last of the series! After he had made this discovery, he sat for a little while vacantly gazing out of the window. His sense of the useless result to which the search he had been prosecuting had led him, thus far, seemed to have robbed him of half his energy already. He looked once or twice at the letter superscribed by Joanna Grice, mechanically reading along the line on the cover:--“Justification of my conduct towards my niece,”--but not attempting to examine what was written inside. It was only after a long interval of hesitation and delay that he at last roused himself. “I must sweep these things out of the way, and read all what I’ve got to read before Zack comes in,” he said to himself, gathering up the letters heaped at his feet, and thrusting them all back again together, with an oath, into the box. He listened carefully once or twice after he had shut down the lid, and while he was tying the cords over it, to ascertain whether his wild young friend was opening the street door yet, or not. How short a time he had passed in Zack’s company, yet how thoroughly well he knew him, not as to his failings only, but as to his merits besides! How wisely he foreboded that his boisterous fellow-lodger would infallibly turn against him as an enemy, and expose him without an instant’s hesitation, if young Thorpe got any hint of his first experimental scheme for discovering poor Mr. Blyth’s anxiously-treasured secret by underhand and treacherous means! Mat’s cunning had proved an invaluable resource to him on many a critical occasion already; but he had never been more admirably served by it than now, when it taught him to be cautious of betraying himself to Zack. For the present there seemed to be no danger of interruption. He corded up the box at his leisure, concealed it in its accustomed place, took his brandy-bottle from the cupboard, opened Joanna Grice’s letter--and still there was no sound of any one entering, in the passage downstairs. Before he began to read, he drank some of the spirit from the neck of the bottle. Was there some inexplicable dread stealing over him at the mere prospect of examining the contents of this one solitary letter?