Harry looked up at the cliff again and felt goose bumps.
“But his final destination—and ours—lies a little farther on. Come.”
Dumbledore beckoned Harry to the very edge of the rock where a series of jagged niches made footholds leading down to boulders that lay half-submerged in water and closer to the cliff. It was a treacherous descent and Dumbledore, hampered slightly by his withered hand, moved slowly. The lower rocks were slippery with seawater. Harry could feel flecks of cold salt spray hitting his face.
“Lumos,” said Dumbledore, as he reached the boulder closest to the cliff face. A thousand flecks of golden light sparkled upon the dark surface of the water a few feet below where he crouched; the black wall of rock beside him was illuminated too.
“You see?” said Dumbledore quietly, holding his wand a little higher. Harry saw a fissure in the cliff into which dark water was swirling.
“You will not object to getting a little wet?”
“No,” said Harry.
“Then take off your Invisibility Cloak—there is no need for it now—and let us take the plunge.”
And with the sudden agility of a much younger man, Dumbledore slid from the boulder, landed in the sea, and began to swim, with a perfect breaststroke, toward the dark slit in the rock face, his lit wand held in his teeth. Harry pulled off his cloak, stuffed it into his pocket, and followed. The water was icy; Harry’s waterlogged clothes billowed around him and weighed him down. Taking deep breaths that filled his nostrils with the tang of salt and seaweed, he struck out for the shimmering, shrinking light now moving deeper into the cliff. The fissure soon opened into a dark tunnel that Harry could tell would be filled with water at high tide. The slimy walls were barely three feet apart and glimmered like wet tar in the passing light of Dumbledore’s wand. A little way in, the passageway curved to the left, and Harry saw that it extended far into the cliff. He continued to swim in Dumbledore’s wake, the tips of his benumbed fingers brushing the rough, wet rock.
Then he saw Dumbledore rising out of the water ahead, his silver hair and dark robes gleaming. When Harry reached the spot he found steps that led into a large cave. He clambered up them, water streaming from his soaking clothes, and emerged, shivering uncontrollably, into the still and freezing air.