Some of the Fireheads worked at the hearths, turning spitted meat. One female had a piece of skin staked out over the ground and she was scraping it with a sharpened stone, removing fat and clinging flesh and sinew, leaving the surface smooth and shining. He saw a male making deerskin into rope, cutting strips crosswise for strength. They seemed, in fact, to use every part of the animals they hunted: tendons were twisted into strands of sinew, and bladders, stomach and intestines were used to hold water.

They made paint, of ground-up rock mixed with animal fat, or lichen soaked in aurochs’ urine. Many of them had marked their skins with stripes and circles of the red and yellow coloring, and they wore strings of beads made of pretty, pierced stones or chipped bones.

Many of the Fireheads were fascinated by Longtusk. They broke off what they were doing and followed, the adults staring, the cubs dancing and laughing.

Here was one small group of Fireheads — perhaps a family — having a meal, gathered around a sputtering fire. They had bones that had been broiled on their fire, and they cracked the bones on rocks and sucked out the soft, greasy marrow within. Longtusk wondered absently what animals the bones had come from.

As he passed — a great woolly mammoth bearing a huge skull and with the daughter of the chief clinging proudly to his back — the Fireheads stopped eating, stared, and joined the slow, gathering procession that trailed after Longtusk.

…Now, surrounded by Fireheads, he was aware of discomfort, a sharp prodding at his rump.

He turned. He saw the Shaman, Smokehat, bearing one of the hunters’ big game spears. The quartz tip was red with blood: Longtusk’s blood.

He saw calculation in the Shaman’s small, pinched face. Sensing his tension, Smokehat was deliberately prodding him, trying to make him respond — perhaps by growing angry, throwing off Crocus. If that happened, if he went rogue here at the heart of the Firehead settlement, Longtusk would surely be killed.

Longtusk snorted in disgust, turned his back and continued to walk.

But the next time he felt the tell-tale prod at his rump he swished his tail, as if brushing away flies. He heard a thin mewl of complaint.

Smokehat was clutching his cheek, and blood leaked around his fingers. Longtusk’s tail hairs had brushed the Firehead’s face, splitting it open like a piece of old fruit. With murder in his sharp eyes, the Shaman was led away for treatment; and Longtusk, with quiet contentment, continued his steady plod.

He heard a trumpeted greeting. He slowed, startled.

There were mastodonts here: a small Family, a few adult Cows, calves holding onto their mothers’ tails with their spindly little trunks. They wandered freely through the settlement, without hobbles or restraints, mingling with the Fireheads.

One of the Cows was Neck Like Spruce.

"Well, well," she said. "Quite a spectacle. Life getting dull out in the stockade, was it?"

When he replied, his voice was tight, his rumbles shallow. "If you haven’t anything useful to say, leave me alone."

She sensed his tension, and glanced now at the hunters who followed him, spears still ready to fly. "Just stay calm," she said seriously. "They are used to us. In fact they feel safer if we are here. Where there are mastodonts, the cats and wolves will not attack… Where are you going?"

He growled. "Do I look as if I have the faintest idea?"

She trumpeted her amusement, and broke away from her Family to walk alongside him.

At last the motley procession approached the very heart of the Firehead settlement, and Longtusk slowed, uncertain.

There were larger structures here — perhaps a dozen of them, arranged in an uneven circle. They were rough domes of gray-green and white. The largest of all, and the most incomplete, was at the very center.

Crocus slid easily to the ground. She took the tip of Longtusk’s trunk in her small paw and led him into the circle of huts.

He stopped by one of the huts. It was made of turf and stretched skin and rock, piled up high. On the expanses of bare animal skin, there were strange markings, streaks and whirls of ochre and other dyes, and there and there the skin was marked with the unmistakable imprint of a Firehead paw, marked out as a silhouette in red-brown coloring. The dome-shaped hut had a hole cut in its top, from which smoke curled up to the sky.

There were white objects arrayed around the base of the hut. White, complex shapes.

Mammoth bones.

Big skulls had been pushed into the ground by their tusk sockets, all around the hut. Curving bones, shoulder blades and pelvises, had been layered along the lower wall of the hut. There were heavier bones, femurs and bits of skulls, tied to the turf roof. And two great curving tusks had been shoved into the ground and their sharp points tied together to form an arch over a skin-flap doorway.

Some of the bones were chipped and showed signs of where they had been gnawed by predators, perhaps as they had emerged from the remote river bank where they had been mined.

Now the flap of skin parted at the front of the hut, and a woman pushed out into the colder air. She gaped at the woolly mammoth standing before her, and clutched her squealing infant tighter to her chest.

Longtusk, baffled, was filled with dread and horror. "By Kilukpuk’s last breath, what is this?"

"This is how the Fireheads live, Longtusk," said Neck Like Spruce. "The turf and rock keeps in the warmth of their fires…"

"But, Spruce, the bones. Why…?"

She trumpeted her irritation at him. "This is a cold and windy place, if you hadn’t noticed, Longtusk. The Fireheads have to make their huts sturdy. They prefer wood, but there is little wood on this steppe, and what there was they have mostly burned. But there are plenty of bones."

"Mammoth bones."

"Yes. Longtusk, your kind have lived here for a long time, and the ground is full of their bones. In some ways bone is better than wood, because it is immune to frost and damp and insects. These huts are built to last a long time, Longtusk, many seasons… And it does no harm," she said softly.

"I know." For, he realized, these mammoths had long gone to the aurora, and had no use for these discarded scraps.

There was a gentle tugging at his trunk. He glanced down. It was Crocus; she was trying to get him to come closer to the big central hut.

He rumbled and followed her.

This hut would eventually be the biggest of them all — a fitting home for Bedrock and his family, including little Crocus — but it was incomplete, without a roof.

A ring of mammoth femurs had been thrust into the ground in a circle at the base, and an elaborate pattern of shoulder blades had been piled up around the perimeter of the hut, overlapping neatly like the scales of some immense fish.

The floor had been dug away, making a shallow pit. Flat stones had been set in a circle at the center of the hut to make a hearth. And there was a small cup of carved stone, filled with sticky animal fat, within which a length of plaited mastodont fur burned slowly, giving off a greasy smoke. With a flash of intuition he saw that it would be dark inside the hut when the roof had been completed; perhaps sputtering flames like these would give the illusion of day, even in darkness.

Under Crocus’s urging, he laid down the skull he carried, just outside the circle of leg bones. Crocus jumped on it, excited, and made big swooping gestures with her skinny forelegs. Perhaps this skull would be built into the hut. Its glaring eye sockets and sweeping tusks would make an imposing entrance.

Now Crocus ran into the incomplete hut, picked up a bundle wrapped in skin, and held it up to Longtusk. When the skin wrapping fell away Longtusk saw that it was a slab of sandstone, and strange loops and whorls had been cut into its surface.