A tarn lies under two hills, draining water from a tussock-linked tract of bog called The Chains. The tarn is deep and brown and still, reflecting rushes and reeds at its sides, the sedges of the hills, and the sky over them. The northern end of the tarn is morass, trodden by deer and ponies. Water trickles away under its southern bank, and hurries in its narrow course by falls, runnels, pools and cascades. One afternoon Tarka climbed out of the rillet's bed, scarcely wider than himself, and looked through green hart's-tongue ferns at the combe up which he had travelled. Nothing moved below him except water. He walked up the hill, and saw the tarn below him. He heard the dry croaking of frogs, and ran down the bank that dammed the dark peat-water. A yard down the slope he stopped. A hen-raven, black from bristled beak to toes, hopped along the edge of the tarn when she saw him. Tarka heard small plopping sounds and saw ripples in the water, where bull-frogs had dived off the bank. The raven took three hops to a pile of dead frogs, then stopped, crouched down, poked out her head with flattened feathers, and gazed at Tarka. Her small eyes flickered with the whitish-grey membranes of the third eyelids. The raven was not afraid of an otter. She had been fishing for frogs by dapping the water with her beak. Hearing the noises, the bull-frogs swam to the surface and turned with bulging eyes towards the dapping. The raven made a dry and brittle croak. When the frogs heard it, the skin swelled under their necks, and they croaked a challenge, mistaking the noises for the struggle of a choking female. They swam within a few inches of the raven's beak. One, perhaps two, would leap out of the water, and then the raven opened her beak and caught one, perhaps two. She was very quick. She hopped with them to her pile, spiked them through the head, and walked quietly to another fishing place. She could carry eight or nine frogs in her craw at once to her nest of young in a rocky clitter near the head of the river Exe. When loaded, she flew with gaping beak. Tarka lifted his head and worked his nostrils. The steadfast glance of the small eyes along the black beak pointed at him. He smelled the frogs, took three quaddling steps towards the raven, and stopped again. The raven did not move, and he did not like her eyes. He turned away. She hopped after him, and nipped the tip of his rudder as he slipped into the tarn. _Krok-krok-krok!_ said the raven, cocking an eye at the sky. Tarka lay in the water and watched her picking up frog after frog and pouching them, before she jumped off the bank and flew over the eastern hill.