"Look here!" He turned the menu card round.

On the back he had sketched some sort of a device with the pencil which he had picked up, and which instead of black-lead contained a peculiar shade of yellow crayon.

Felix sat as though turned to stone.
"Try," Mr.Sabin said smoothly, "and avoid that air of tragedy.

Some of these good people might be curious." Felix leaned across the table.

He pointed to the menu card.
"What does that mean ?" he muttered.
Mr.Sabin contemplated it himself thoughtfully.