Mnementh landed, his feet sinking into the oozing terrain. F’lar jumped off and peered closely at the bush. Had the holes been made by droplets of hot Thread during a previous Fall? No. The leaves would long since have dropped off. He examined every nearby hummock of grass. Not a sign of burrows. Yet Thread had fallen—and it had to be this Fall—had pierced leaves, grass and tree over a widespread area—and vanished without a trace. No, that was impossible! Gingerly, for viable Thread could eat through wher-hide gloves, F’lar dug around the berry bush. Mnementh helpfully scooped out a deep trench nearby. The displaced soil teamed with grub life, writhing in among the thick tough grass roots. The unexpectedly gray, gnarly taproots of the bush were thick with the black earth but not a sign of Thread.

Mystified, F’lar raised his eyes in answer to a summons from the hovering weyrlings.

They wish to know if this is the Edge of Threadfall, Mnementh reported to his rider.

“It must be further south,” F’lar replied and waved the weyrlings in that direction. He stood looking down at the overturned earth, at the grubs burrowing frantically away from sunlight. He picked up a stout barkless branch and jabbed the earth of the trench Mnementh had made, prodding for the cavities that meant Thread infestations. “It has to be further south. I don’t understand this.” He ripped a handful of the leaves from a berry bush and sifted them through his gloves. “If this happened some time ago, rain would have washed the char from the punctures. The damaged leaves would have dropped.”

He began to work his way south, and slightly east, trying to ascertain exactly where Thread had started. Foliage on every side gave evidence of its passage but he found no burrows.

When he located drowned Thread in the brackish water of a swamp pool, he had to consider that as the leading Edge. But he wasn’t satisfied and bogged himself down in syrtis muds investigating, so that Mnementh had to pull him free.

So intent was he on the anomalies of this Fall, that he did not notice the passage of time. He was somewhat startled, then, to have T’bor appear overhead, announcing the end of Fall. And both men were alarmed when the ground-crew chief, a young fisherman from Ista named Toric, verified that the Fall had lasted a scant two hours since discovery.

“A short Fall, I know, but there’s nothing above, and Toric here says the ground crews are mopping up the few patches that got through,” T’bor said, rather pleased with the efficient performance of his Weyr.

Every instinct told F’lar that something was wrong. Could Thread have changed its habits that drastically? He had no precedent. It always fell in four-hour spans—yet clearly the sky was bare.