I won't go.

Sep Duncan may if he likes, but I shall stop." He caught frantically at poor Bigley's collar as he spoke, set his teeth, and then closed his eyes.
"No, no! Run, Bob; run, Sep!" panted Bigley, as if he was being suffocated; "the water will be over us directly, and you must go and tell poor father where I am." "I sha'n't go and leave you two," I said sullenly; and I also caught hold of him, set my teeth, and swung round as a bigger wave than ever came rolling smoothly in, and regularly seemed to leap at us as it broke upon the rocks, and after deluging us, rushed up, and came down again in a rain of spray.
What followed seems wild and confused, for the sea was rising fast, and we were deluged by every wave, while the greater ones that came every now and then threatened to snatch us away; but everything was as if it occurred in a dream.
Somebody said to me once that Bob Chowne and I behaved in a very heroic manner, standing by our school-fellow as we did; but I don't think there was much heroism in it.

We couldn't go and leave him to drown.

I wanted to run away, and Bob Chowne afterwards said that he longed to go, but, as he put it, poor fellow, it seemed so mean to leave him to drown all alone.
At all events we stayed, and, as I say, what followed appears to me now to have been dreamy and strange.

The water came splashing over us always, but every now and then a great solid wave drove us together, lifting us to strike against the rocks, and then letting us fall heavily, but only to leap in again, and snatch us up as they beat, and swirled, and hissed, and dragged at us like wild creatures, and if we had not held on so tightly to poor Bigley, we must have been washed outwards from the shore.
As I say I don't know how long this lasted, only that we were getting more and more helpless and confused, when a tremendous wave came rolling in and struck full in the grotto-like opening where poor Bigley was wedged.