They came to the snout of one of the great glaciers. The glacier was a river of ice, flowing with invisible slowness, its smooth curves tinted blue, surprisingly clean and beautiful.

The glacier had poured, creaking, down from the Mountains, carving and shattering the rock as it proceeded. But here, where it spilled onto the rocky plain, the pressure on that ice river was receding. The glacier calved into slices and towers, some of which had fallen to lie smashed in great blocks at her feet. Silverhair found herself walking amid sculptures of ice and snow, carved by the wind and rain into columns and wings and boulders, adorned with convoluted frills and laces, extraordinarily delicate and intricate.

But the land here was difficult. The mammoths were forced to thread their way between the ice blocks and the moraines, uneven mounds of sharp-edged debris, scoured by the glacier from the Mountains and deposited here. The wind was hard now, spilling off the Mountains. It plastered the mammoths’ hair against their bodies, and Silverhair could feel it lashing against her eyes.

At last the glacier itself loomed above them, a wall of green ice and windswept snow.

Silverhair was stunned by the glacier’s scale. The mammoths were the largest creatures in this landscape, yet the ice wall before her was so tall, its top was lost in mist that lingered above, as if reaching to the very clouds. Where the low sunlight caught the ice, it shone a rich white-blue, as if stars were trapped within its structure; but loose fragments scattered over its surface sparkled like dew.

A pair of Arctic foxes sprinted past, probably a mating pair, their sleek white forms hard to see against the ice; Silverhair heard the foxes’ complex calls to each other.

There was a flash, and thunder cracked; the mammoths flinched.

"Take it easy," shouted Eggtusk, his trunk aloft, sniffing for danger. "That was well to the south of us. Probably struck in that forest we skirted."

Silverhair looked that way. There was another flash, and this time she saw the lightning bolt, liquid fire that shot down into the forest from the low clouds racing above. The bolt struck a tree, which fell into the forest with a crash. A steady, reddish glow was gathering in the heart of the forest.

Fire.

Now the rain came, a hard, driving, almost horizontal sheet of water, laced with snow and hailstones.

The Matriarch had to shout and gesture. "We’ll climb up toward the Mountains. Maybe we can shelter until this passes. Silverhair, look after Foxeye and the calves. The rest of you help Wolfnose. Hurry now."

The Family moved to obey.

…Save for Lop-ear, who came up to Silverhair. "I’m worried about that fire," he said. "The grasses here are as dry as a bone, and with that wind, the fire could soon be on us."

She looked toward the forest. The light of the fire did seem to be spreading. "But it’s a long way away," she said. "And the rain—"

"Is hard but it’s just gusting. Not enough to extinguish the forest, or even soak the grass."

Soft, wet snow lashed around them.

Silverhair looked for the infant, Sunfire. Foxeye was anxiously tugging at the baby’s ear. But the calf was half lying on the frozen ground, mewling pitiably. The snow had soaked into her sparse, spiky fur, making it lie flat against her compact little body; Silverhair could see lumpy ribs and backbone protruding through a too-thin layer of fat and flesh.

She stood with Foxeye, and by pulling at Sunfire’s ears and trunk, managed to cajole the calf to her feet. Then Silverhair and Foxeye stood one to either side of the infant, supporting her tiny bulk against their legs. Silverhair could feel the calf shiver against her own stolid legs.

They tried to move her forward, away from the spreading flames. But the bedraggled Sunfire was too exhausted to move.

Silverhair looked back over her shoulder anxiously. Fanned by the swirling wind, the fire had taken a firm hold in the stand of trees behind them, and an ominous red light was spreading through the gaunt black trunks. Already she could see flames licking at the dry grass of the slice of exposed tundra that lay between the mammoths and the forest.

But her awareness of the fire spread far beyond the limited sense of sight. She could smell the gathering stink of wood succumbing to the flames, the sour stench of burning sap, hear the pop and hiss of the moist wood. She understood the fire, felt it on a deep level; it was as if a flame were burning through the world map she carried in her head.

She knew they had to flee. But she and Foxeye could not handle the calf on their own. She turned, looking for help.

Poor Wolfnose was turning away from the fire, slow and stately as some giant hairy iceberg, but her stiff legs were unable to carry her as once they had. "I’m not a calf anymore, you know…" But Owlheart, Eggtusk, and Lop-ear were striving to help her. Their giant bulks were walls of soaked fur to either side of Wolfnose, and Lop-ear had settled himself behind her, and was pushing at her rear with his lowered forehead. Owlheart, helping with her mother and trumpeting instructions to the Family as a whole, was even finding time to wrap a reassuring trunk over the head of Croptail; the young Bull stuck close to the Matriarch.

But that left nobody to help Silverhair and Foxeye with the calf.

Nobody — except her aunt, Snagtooth, who stood away from the others, still mewling like a distressed calf over her shattered tusk.

Silverhair turned to Foxeye and raised her trunk. "Wait here."

Foxeye, exhausted herself, was close to panic. "Silverhair — don’t leave me—"

"I’ll be back." She trotted quickly over to Snagtooth.

The mud Owlheart had caked over the smashed tusk stump was beginning to streak over Snagtooth’s fur and expose the mess of blood and pulp that lay beneath. Snagtooth’s eyes were filled with a desolate misery, and Silverhair felt a stab of sympathy, for the wound did look agonizing. But for now, she knew she had to put that from her mind.

She grabbed her aunt’s trunk and pulled. "Come on. Foxeye needs your help."

"I can’t. You’ll have to cope. I have to look after myself." Snag-tooth snatched her trunk back.

Silverhair growled, reached up with her trunk, and grabbed Snagtooth’s healthy tusk. "If there was anybody else, I wouldn’t care," she rumbled. "But there isn’t anybody else." She moved closer to Snagtooth and spoke again, loud enough to be audible over the howling of the storm, soft enough so nobody else could hear. "Are you going to come with me, or are you going to make me drag you?"

For long heartbeats Snagtooth stared down at Silverhair. Snagtooth was older, and massive for a Cow, a good bit bigger than Silverhair. Silverhair wondered if Snagtooth would call her bluff and challenge her — and if she did, whether Silverhair could cope with her, despite the smashed tusk.

But Snagtooth backed down. "Very well. But you aren’t Matriarch yet, little Silverhair. I won’t forget this."

She turned away, and with evident reluctance made her way toward Foxeye and the slumping Sunfire.

Silverhair felt chilled to the core, as if she’d taken a bellyful of snow.

It was slow going. The two groups of Family, huddled around the calf and the proud old Cow, seemed to crawl across the hard ground.

Here and there the snow was drifting into deceptively deep pockets. Mammoths always have difficulty traversing deep snow; now Silverhair felt her legs sink into the soft, slushy whiteness, and it pushed like a rising tide up around the long hair of her belly, chilling her dugs. In the deepest of the drifts she had to work hard with Foxeye to keep the calf’s head and trunk above the level of the snow.

And all the time Silverhair could sense the fire pooling over the dry ground. The snow was having no effect now, such was the heat the fire was generating, and she knew their only chance was to outrun it. She stayed close to Sunfire, sheltering the calf from the wind and encouraging her to hurry — and she tried to contain her own rising panic.