The second letter from the east arrived in midsummer and was mostly about Renn.Yssel wrote about her with the quality Yssel brought to things she found genuinely significant — the direct notation of the thing itself, without interpretation, because the thing itself was the point. Renn was fifty-three. She had lived in the eastern territories her whole life, in the hill country above the Valdric drainage, in the same house her mother had lived in and her mother's mother before that. She was a practical person — she kept a small holding, maintained trade relations with the villages in her valley, had a reputation for being the person you came to when something needed solving rather than surviving.She had been hearing the substrate for as long as she could remember. In her childhood she had asked her mother about it and her mother had looked at her without recognition — not the look of someone concealing knowledge, but the look of someone who genuinely did not know what she was talking

The Warden came to the Root-spring on the morning of the autumn equinox, which was not something she had done before — she tended to the Greywood as a whole, visited specific sites when they required tending, but the Root-spring site had been Kael's domain since its discovery, and she had left it to him.He was there when she arrived, as he was most mornings — the daily measurement had become his practice, the thing he did before the archive work, the hour in which he stood at the root-platform and felt the amber pulse and noted, without instruments, the quality of the frequency. Tal had instruments. Kael had attention. Both produced data, different in kind, complementary in use.The Warden stood beside him for a while without speaking. The Greywood in autumn was its most legible — the leaf-fall made the light different, the canopy thinning to let through a quality of illumination that was not available in the denser seasons. The root-platform was covered in fallen leaves, amber and ru

Yssel's winter letter arrived in the deep cold, when the Greywood was silent under snow and the Root-spring's hum was the only sound that came through the substrate with any clarity, the cold pressing everything else down to silence.The letter was longer than the others. She had been in the eastern territories for eight months, and eight months of data had given her things to say that six weeks of data had not."The substrate here," she wrote, "is structured differently from the Ashenveil substrate. I don't have the theoretical framework yet to describe the structural difference precisely, but here is what I can observe: the frequency layers are more distinct. In Ashenveil, the Root-Aeth substrate is integrated — the frequencies at different depths interact and produce a blended reading. Here, the layers are separate. You can read the depth of the past in the layers the way you read geological strata — the most ancient frequencies at the deepest level, the more recent frequencies clos

The eighth Gathering had six hundred and eleven attendees.Kael stood at the gate and watched them come, as he had watched them come for seven years, but this year differently — this year Yssel was not here, and Orren was not here, and their absence was audible in the particular frequency of the city. The Gathering without them had a different sound. Not worse. Different.Aldren Sove came on the first day this year, which was different from last year. He had found his bearings in the community over the past twelve months — had attended regional sessions, had begun corresponding through the network, had been, Mira reported, a reliable and precise correspondent. He arrived with three practitioners from his testing centre, all of them new to the Gathering, and he stood in the gate with the ease of someone who had been here before and was now showing others where here was.Kael watched this and felt something that was not quite pride and was something better.The Gathering without Yssel ha

In the second year of the eastern expedition, Yssel found something she had not expected.She wrote about it in her midwinter letter, which arrived at the Collegium in the cold month when the Greywood was at its most silent and the Root-spring's hum was the clearest sound in the substrate, undiluted by the seasonal frequencies of growth."In the eastern carrier community," she wrote, "there is a practice that has no name and no framework and has been happening, Renn tells me, for as long as anyone in the region can remember.""The carriers — the ear-variants, which is what the majority of eastern carriers appear to be, consistent with the substrate profile — gather in certain locations at certain times of year. Not regularly scheduled. Renn cannot explain the scheduling. She says they know when to gather because they hear it. The frequency changes. Something in the substrate shifts, and the carriers who are sensitive to the deep frequency know that this is a time to gather.""I have at