In the clear water he beheld Delbier at the bottom.
The fellow had disjointed himself in some way and could not straighten out.
He was in great danger of drowning.
Without hesitation Leo leaped into the tank, intending to raise the doubled-up body.
He made an alarming discovery.
Delbier had a cramp, and his right hand and left foot were tightly twisted about a corner brace in the bottom of the water-box.
In vain Leo tugged to free the diver. He could not break that deathlike hold.
In less than half a minute Leo was out of breath.
It looked as if he must arise to the surface and leave poor Delbier to his fate.
But then he clinched his teeth.