It was incredible.

Jeremy Stone found himself staring at a single unit of the organism. It was a perfect, six-sided hexagon, and it interlocked with other hexagons on each side. The interior of the hexagon was divided into wedges, each meeting at the precise center of the structure. The overall appearance was accurate, with a kind of mathematical precision he did not associate with life on earth.

It looked like a crystal.

Early sketch by Jeremy Stone of hexagonal Andromeda configuration.

Photo courtesy project Wildfire

He smiled: Leavitt would be pleased. Leavitt liked spectacular, mind-stretching things. Leavitt had also frequently considered the possibility that life might be based upon crystals of some kind, that it might be ordered in some regular pattern.

He decided to call Leavitt in.

As soon as he arrived, Leavitt said, "Well, there's our answer."

"Answer to what?"

"To how this organism functions. I've seen the results of spectrometry and amino-acid analysis."

"And?"

"The organism is made of hydrogen, carbon, oxygen, and nitrogen. But it has no amino acids at all. None. Which means that it has no proteins as we know them, and no enzymes. I was wondering how it could survive without protein-based organization. Now I know."

"The crystalline structure."

"Looks like it," Leavitt said, peering at the screen. "In three dimensions, it's probably a hexagonal slab, like a piece of tile. Eight-sided, with each face a hexagon. And on the inside, those wedge-shaped compartments leading to the center."

"They would serve to separate biochemical functions quite well."

"Yes," Leavitt said. He frowned.

"Something the matter?"

Leavitt was thinking, remembering something he had forgotten. A dream, about a house and a city. He thought for a moment and it began to come back to him. A house and a city. The way the house worked alone, and the way it worked in a city.

It all came back.

"You know," he said, "it's interesting, the way this one unit interlocks with the others around it."

"You're wondering if we're seeing part of a higher organism?"

"Exactly. Is this unit self-sufficient, like a bacterium, or is it just a block from a larger organ, or a larger organism? After all, if you saw a single liver cell, could you guess what kind of an organ it came from? No. And what good would one brain cell be without the rest of the brain?"

Stone stared at the screen for a long time. "A rather unusual pair of analogies. Because the liver can regenerate, can grow back, but the brain cannot."

Leavitt smiled. "The Messenger Theory."

"One wonders," Stone said.

The Messenger Theory had come from John R. Samuels, a communications engineer. Speaking before the Fifth Annual Conference on Astronautics and Communication, he had reviewed some theories about the way in which an alien culture might choose to contact other cultures. He argued that the most advanced concepts in communications in earth technology were inadequate, and that advanced cultures would find better methods.