at half-past eight this morning, and of course, I have made some inquiries about the circumstances of my grandfather's sudden death. He died very suddenly indeed at Mr. Eldrick's office. He had gone there on some business about which nobody knows nothing—he died before he could mention it. And according to his shop-boy, Jabey Naylor, the last thing he did was to write a letter to you. Now—I have reason for asking—would you mind telling me, Mrs. Mallathorpe, what that letter was about?" Mrs. Mallathorpe moved over to the hearth, and took an envelope from the rack. She handed it to Collingwood, indicating that he could open it. And Collingwood drew out one of old Bartle's memorandum forms, and saw a couple of lines in the familiar crabbed handwriting:
"Mrs. Mallathorpe, Normandale Grange.
"Madam,—If you should drive into town tomorrow, will you kindly give me a call? I want to see you particularly.
"Respectfully, A. Bartle."
Collingwood handed back the letter.
"Have you any idea to what that refers?" he asked.
"Well, I think I have—perhaps," answered Mrs. Mallathorpe. "Mr. Bartle persuaded us to sell him some books—local books—which my late brother-in-law had at his office in the mill. And since then he has been very anxious to buy more local books and pamphlets about this neighbourhood, and he had some which Mr. Bartle was very anxious indeed to get hold of. I sup-
