there, the song grew stronger in their hearts as well, and they stopped straggling and picked up their pace.
It was good that they did, because Alvin felt it like a blow when the first of the soldiers charged onto the bridge. It was his heartfire they were treading on, and where the people's feet had been light, the soldiers' boots were heavy, and as they ran along the narrow bridge Alvin heard them fighting the greensong like the cacophony of two marching bands playing wildly different tunes.
It weakened him and slowed him down, just a little at first, but more and more as they drew nearer. Hundreds of them, carrying muskets. At the far end of the bridge, someone was trying to get a horse out onto the crystal-a horse pulling a light piece of field artillery.
"I can't hold that up," gasped Alvin.
"Almost there," called Dead Mary. "I can see the shore!" She started to run.
But there was no fog on this side of Pontchartrain, so seeing the campfires on the far shore did not mean they were truly almost there. Alvin slowed, staggered. Again he had to lean on the women until they were almost dragging him along. Again he felt alone, abandoned by-or perhaps merely oblivious to-the greensong. But with each weakening of his own strength under the burden of the approaching army, he could feel another strength move in under his blood in the skeleton of the bridge. Arthur Stuart was already reaching far beyond his strength, but Alvin had no choice but to rely on his strength until all were safe.
Just when it seemed that the bridge was lengthening infinitely before them, they closed the last hundred, the last fifty, the last dozen steps and staggered onto the shore. Dead Mary had set down her barrow on the bank and now hovered around, eager to help.
There lay Arthur Stuart, prostrate in the sand, Papa Moose and Mama Squirrel kneeling beside him, their hands on him, Papa Moose praying, Mama Squirrel singing the first words Alvin had ever heard anyone put to the greensong, words about sap and leaves, flowers and insects, fish and birds and, yes, squirrels all climbing along in the nets of God.
Arthur Stuart's hands were extended, his wrists bleeding onto the bridge, and his fingers digging down into the face of the crystal. He shouldn't have been able to do that, to push his skin and bone into Alvin's crystal bridge, but here it was partly Arthur Stuart's, and right around his bleeding fingers it was almost entirely his bridge, so it followed his need.
Alvin sank down beside him and rested his hands and head on Arthur's back. "Arthur, you got to let go now, you got to let go first. When I let go of it the whole weight of it will fall on you, and you can't bear it, you got to let go first."
Arthur seemed not to hear him, so deep was he in his trance of concentration.
"Pull his hands out of the bridge," Alvin said to the others.
But Moose and Squirrel couldn't do it, and La Tia and Dead Mary couldn't do it, and Alvin whispered into his ear, "They're coming and we can't bear them up, the bridge can't hold such a harsh load, you got to let go, Arthur Stuart, I can't hold it any longer and if you try to hold alone it'll kill you."
Arthur Stuart finally managed to make an answer, barely audible. "They'll die."
"I reckon so," said Alvin. "Them as can't swim. They'll die trying to bring slaves back into slavery. It ain't your job to keep alive such men as would do that."
"They're just soldiers," said Arthur Stuart.
"And sometimes good men die in a bad cause, when it comes to war."
Arthur Stuart wept. "If I let go I'm killing them."
"They chose to come up on a bridge that was built for freedom, with slavery and killing in their hearts."
"Bear them up, Alvin, or I can't let go."
"I'll do my best," said Alvin. "I'll do my best."
With a final cry of anguish Arthur Stuart tore his blood-covered hands out of the crystal. Alvin felt his heartfire vanish from the substance of the bridge, and in that moment he withdrew his own.
It lingered for a long moment, held by the blood alone.
And then the bridge was gone.
"Bear them up in the water!" cried Arthur Stuart. And then he fell into something between a faint and a deep sleep.
Papa Moose and Mama Squirrel drew him back