The Moonpool reflected starlight, its surface unruffled in the shelter of the encircling rock. Rootspring stared in confusion as Ashfur waded into the water,  dragging  Squirrelflight  with  him. Is  he  going  to  drown  her? Rootspring’s paws shook beneath him as he stumbled after them. Ashfurpushed deeper into the pool, his eyes glittering with triumph as, with a grunt, he pressed Squirrelflight beneath the surface and disappeared after her.

[...]

There was no cat there. He flailed his paws, sweeping the water in a desperate  search. They  can’t  have  disappeared!  Bursting  up  through  the surface, he scanned the hollow. It was deserted. He circled the pool again and again, sinking below the surface in case he could see some sign of Ashfur and Squirrelflight. But the Moonpool was empty. He was alone.

Darkness Within, Chapter 25