“Eh! I thought they had finished.” He spoke jerkily, aware that the study had suddenly become void and silent. “All right, they may come.”

A shuffle of footsteps in the hall, and Mr. Jarrad entered deferentially, hat in hand. He was followed by Dawkins. The younger man looked amused, and a trifle superior.

“I beg pardon for disturbing you like this, sir, but on looking over our notes I find that my colleague has omitted to make an entry concerning this desk.”

“Anything the matter with the desk?” asked Derrick curiously.

“No, sir, it’s merely the point of its physical condition, which would naturally affect any possible question of dilapidations. When I examined it I noticed a large stain on the leather, quite faint and dull. It’s the sort of thing one generally finds on desks of this character, especially when there happen to be young people in the family. I did not detect it till for some reason I made a second inspection. Now it seems that either I did not mention this for record or, if I did, my colleague failed to make the entry. So with your permission I’ll show it to him.”

Derrick felt no surprise. “Certainly,” he said mechanically. “Do you need more light?”

Mr. Jarrad shook his head, advanced to the desk, reverentially moved a sheaf of manuscript, put on his glasses, and bent low over the glossy surface. Dawkins stood at his elbow looking openly incredulous.

“I can’t see anything, just the same,” said the latter, “and a stain is a stain.”

Mr. Jarrad shifted the lamp and peered hard. “Curious,” he murmured to himself. “How very curious! I could have sworn that—ah—there, my friend,” he nodded with satisfaction, “you can see it now. It seems a little more difficult to place than the last time, but there it is, and quite large.” He ran a thin finger over an irregular outline. “In a certain light it might be almost invisible. Very faint, I admit, but surely your young eyes are as sharp as my glasses?”

Dawkins scrutinized, nodded, mumbled an apology, and made an entry in the large book. Mr. Jarrad turned to Derrick.