At half past six on the twenty-first of June 1922, when Count Alexander Ilyich Rostov was escorted through the gates of the Kremlin onto Red Square, it was glorious and cool. Drawing his shoulders back without breaking stride, the Count inhaled the air like one fresh from a swim. The sky was the very blue that the cupolas of St. Basil’s had been painted for. Their pinks, greens, and golds shimmered as if it were the sole purpose of a religion to cheer its Divinity. Even the Bolshevik girls conversing before the windows of the State Department Store seemed dressed to celebrate the last days of spring.

BOYS are playing basketball around a telephone pole with a backboard bolted to it. Legs, shouts. The scrape and snap of Keds on loose alley pebbles seems to catapult their voices high into the moist March air blue above the wires. Rabbit Angstrom, coming up the alley in a business suit, stops and watches, though he’s twenty-six and six three. So tall, he seems an unlikely rabbit, but the breadth of white face, the pallor of his blue irises, and a nervous flutter under his brief nose as he stabs a cigarette into his mouth partially explain the nickname, which was given to him when he too was a boy. He stands there thinking, the kids keep coming, they keep crowding you up.

You go down through the Ocean View district of San Francisco to the first freeway exit after Daly City, where you describe, in effect, a hairpin turn to head north past a McDonald’s to a dead end in a local dump. It is called the Daly City Scavenger Company. You leave your car and walk north on a high contour some hundreds of yards through deep grasses until a path to your left takes you down a steep slope a quarter of a mile to the ocean. You double back along the water, south to Mussel Rock.

When the crops were under cover on the Wayne farm near Pittsford in Vermont, when the winter wood was cut and the first light snow lay on the ground, Joseph Wayne went to the wing-back chair by the fireplace late one afternoon and stood before his father. These two men were alike. Each had a large nose and high, hard cheekbones; both faces seemed made of some material harder and more durable than flesh, a stony substance that did not easily change. Joseph’s beard was black and silky, still thin enough so that the shadowy outline of his chin showed through. The old man’s beard was long and white. He touched it here and there with exploring fingers, turned the ends neatly under out of harm’s way. A moment passed before the old man realized that his son was beside him. He raised his eyes, old and knowing and placid eyes and very blue. Joseph’s eyes were as blue, but they were fierce and curious with youth. Now that he had come before his father, Joseph hesitated to stand to his new heresy.

This is about high-country geology and a Rocky Mountain regional geologist. I raise that semaphore here at the start so no one will feel misled by an opening passage in which a slim young woman who is not in any sense a geologist steps down from a train in Rawlins Wyoming, in order to go north by stagecoach into country that was still very much the Old West. She arrived in the autumn of 1905, when she was twenty-three. Her hair was so blond it looked white. In Massachusetts, a few months before, she had graduated from Wellesley College and had been awarded a Phi Beta Kappa key, which now hung from a chain around her neck. Her field was classical studies. In addition to her skill in Latin and Greek, she could handle a horse expertly, but never had she made a journey into a region so remote as the one that lay before her.