My father quickly anticipated the danger before I realized its awful possibilities.

The iceberg extended down into the water many hundreds of feet, and, as it tipped over, the portion coming up out of the water caught our fishing-craft like a lever on a fulcrum, and threw it into the air as if it had been a foot-ball.
Our boat fell back on the iceberg, that by this time had changed the side next to us for the top.

My father was still in the boat, having become entangled in the rigging, while I was thrown some twenty feet away.
I quickly scrambled to my feet and shouted to my father, who answered: "All is well." Just then a realization dawned upon me.

Horror upon horror! The blood froze in my veins.

The iceberg was still in motion, and its great weight and force in toppling over would cause it to submerge temporarily.