"If you don't know, I can't tell you," he said gruffly.
Monck's fingers closed with quiet persistence.

"Yes, you can.

Out with it!" he said.
But Tommy remained doggedly silent.
Several seconds passed.

Then very suddenly Monck raised his hand and smote him hard on the back.
"Damn!" said Tommy, straightening involuntarily.
"That's better," said Monck.

"That'll do you good.