"Did he seem depressed or morose?"

"I can not say that be did."

"Professor Gehren, what, newspaper do you take?"

The scholar stared. "The Citizen in the morning, The Register in
the evening."

"Are either of them delivered to your laboratory?"

"Yes; the Register."

"Do you keep it on file?"

"No."

"Ah! That's a pity. Then you wouldn't know if one were missing?"

The professor reflected. "Yes, there was a copy containing a letter
upon Von Studeborg's recent experiments--"

"Can you recall the date?"

"After the middle of June, I think."

Average Jones sent for a file and handed it to Professor Gehren.

"Is this it?" he asked, indicating the copy of June 18.