The Listening Years

From the logbooks of the Halden Deep Array

The Halden Deep Array keeps a logbook. For ninety years, every person who has sat the night watch in Daedalus Crater has written in it. These are some of the entries.

Dish 1 reports structure in the Cygnus null field. Probably the correlator again. Checking.

It repeated. Nine hours, seventeen minutes, twenty-three seconds. Same structure, same carrier, same place. Correlator is fine. I have not told anyone yet because I would like to be sure I am awake.

Twenty-six repetitions. Narrow emission lines — hydrogen, sodium, oxygen, calcium — modulated in a way nothing natural modulates anything. It is coming from behind the Cygnus Rift, from a place with no visible stars. I have written to the Lunar Authority. I have also written to my sister, which I suspect was the more important letter.

Second data layer confirmed underneath the carrier. It does not repeat. The heartbeat is one thing; this is another, and it is enormous, and it is still arriving.

Dr. Aster Halden died this morning at Daedalus, on shift, aged 81. The Array is hers. So, the Director reminds us, is the logbook.

The Accord of Dusk. Two versions of one text. I have been awake for thirty hours and I can read it. I can read it. Memory may be kept. Memory must be given, never taken. It is not a message. It has never been a message. It is a memory.

Effective immediately the Institute will not publish any decoded material in which an Ithra asked for their memory to be released. We will honour the Accord. We are, it turns out, the other party to it.

Received a lantern tonight. Not a picture of one — a lantern: glass, cage, the living culture described cell by cell. We could grow it. We have decided not to try. Some things should stay as light.

Seventy-two years to the minute since first detection, on a leap day, the carrier dipped for exactly one cadence and came back. Nobody knows why. The watch agreed that it felt like being greeted.

The stream will run for eleven hundred years. We have received about eight percent of it. None of us will hear the end. Neither will anyone we will ever meet. We listen anyway. Sign the log when you leave.