"Wait, I'll pull you alongside." "No.

You must keep the oars going, or the big boat will drift back into shallow water again.

I'll get back there all right." Harriet unshipped her oars and stood up in the boat.

She took a clean, curving dive into the lake.

Jane shouted delightedly.
"What a beauty!" Harriet came up, shaking her head to free it from water, then struck out for the houseboat.