Frequency of the Fireflies

Under Central, past the loading dock and down a ladder that most people didn't know was there, the old utility tunnels ran west under Cesar Chavez toward the river. Someone had strung them with salvaged LED tape and sheets of copper mesh. The hackerspace lived there, in the warm air from the steam lines, among workbenches built from library carrels.

Darius had grown up in those tunnels, more or less. He was nineteen and had taught himself electronics from a box of manuals someone had donated upstairs, and he went up to the rooftop garden most evenings because he liked the grackles and because Arturo let him touch the transmitter. He was trying to bridge the antenna to the mesh network so the evening broadcast could reach the phones in the Camp, not just the radios.

The week the lightning-bug debate went citywide, Mireya, who ran the far bench and never took off her headlamp, showed him a jar.

Inside, a green light pulsed, slow and even, like something asleep. She had worked out how to extract the light-making chemistry from the insects and keep it glowing in a gel. A jar this size, she said, could light a tunnel for a week. Ten jars and they could switch off the LED tape and give the power back to the building.

"How many bugs?" Darius asked.

She told him. He didn't say anything. In the jar the green light went on breathing.

That night he climbed the ladder and sat on the roof until the broadcast ended. The real ones were out over the creek in their thousands, rising out of the grass and drifting toward the lake. They didn't pulse together. Each one kept its own interval, a bright word and then a pause, and yet the whole bank seemed to be saying something, the way a crowd seems to say something when no one in it is speaking.

On the speaker by the stairs, someone was playing yourdiscovery's "astrobotany," all those slow, glassy chords. He thought about Mireya's jar sitting on her bench in the dark below him, green and patient and alone.

The fireflies blinked in a code nobody had taught them.

He watched until his eyes ached, trying to catch the pattern. He thought if he could write it down, he could put it in the broadcast. It was only later, climbing back down into the warm tunnels, that he understood he'd been listening to it the way you listen to someone sleeping: not to decode it, just to know they were still there.