The wind was now blowing so strongly that the girls found little comfort in sitting on the upper deck.

All hands went below.
With the front cabin door closed the cabin was a comfortable and cosy place in which to sit.

But the cabin floor was acquiring an unpleasant habit of rising and falling.

Tommy's face, ordinarily pale, had grown ghastly, but she pluckily kept her discomfort to herself.

As a matter of fact the little girl was suffering from a mild attack of seasickness.
"I--I gueth I'll go to bed," she stammered.