I suppose we may as well go for a prowl to-night, on the off-chance of finding him.
Oddly enough, it seems as if it might—there's just the off-chance—it might affect the issue.'
Corder stood in the door for a moment, on the off-chance that his friend might be joking.
It was an off-chance, and he well knew it; but there was nothing else to be done.
He kept it on the off-chance ...