He realized the situation and rushed forward.

There was no time to struggle.
"Let him go," he cried.

"You devil--let him go." Then with all his might, he struck Tarboe in the face.

The blow brought understanding back to Tarboe.

His fingers loosed from the Frenchman's throat, and Carnac caught Denzil as he fell backwards.
"Good God!" said Carnac.