Gerald’s quick glance saw something which further aroused his curiosity—a small brand-new tin tea-kettle and a little enamelled basin. With them was a new roll of absorbent cotton-wool and a quart bottle of cheap port wine, which from its label had been purchased of a local grocer. "Funny that he should send her a tea-kettle and basin!" remarked Durrant, as he handled them. "And look! What’s this?" And he took out a small wooden box about three inches square, such as is used by jewellers to send watches by post. He opened it and within, carefully packed in cotton wool, was a small lens surrounded by a threaded brass ring evidently a portion of some optical instrument. "Part of a telescope!" the girl exclaimed. "Surely a widow would not require that—however poor she might be!" "Yes, dear," said her lover, holding the box in his hand and reflecting. "This is a curious hoard, and I am wondering if it is intended for the unknown person who is living in seclusion above." "Well, Mr. Boyne’s explanation to auntie is quite clever, if what you suggest is the solution of the mystery." "But is not Boyne always clever?" he asked. "That he is leading a double life we have already established. It is now for us to solve the problem of the reason of this locked room upstairs." "Then you think this has been bought in order to feed somebody who is living up above in silence and seclusion?" she asked. "It seems like it. But if we watch carefully and see in which direction it disappears, whether inside this house or outside, then we shall begin to penetrate the mystery." "But how shall we do it?" "This requires very careful consideration, dear," was his reply. "My own feeling is that you should by some means or other endeavour to spend the next few days here with your aunt, so that you can keep daily watch upon this strange collection of provisions. But we mustn’t remain here, for Boyne may return at any moment." So they descended the stairs to the kitchen, and hardly had they reached it when the heavy tread of the man of mystery was heard in the hall above. While Mrs. Felmore was upstairs interviewing her employer as to what he required for tea, the lovers held hurried consultation. When the old woman returned, Gerald rose and motioned to her that he intended to go as perhaps Mr. Boyne would not like to discover him there. He placed his finger upon his lips, shook hands with the deaf housekeeper, and stole out and up the area steps, keeping well out of sight of Boyne’s window. "Mr. Durrant was in a hurry, eh?" asked the old woman. "Yes, auntie. He was afraid that Mr. Boyne might not like him calling here, so he’s gone. But I’m here, and—well, to tell you the truth, auntie, I don’t exactly know what to do!" "Do—why?" asked the old woman, her eyes starting as was her habit when surprised.