Description

Sits on the stable-space lip of the Span mouth, at the Sable throat — "the single door out of the Sable Reach": outside the reach geographically, controlling the single authenticated door into and out of it. The one fixed chokepoint every hull must pass. The Cairn does not move; the meaning of what lies beyond it changes — in Who the Door Admits the edge of an unproven road, by The Cairn the boundary before damaged space. Who the Door Admits/What First Call Buys/Who Gets to Answer establish it as the reach's gateway. The road the Dawnward opens through the reach (Wide Sky) wounds the reach's sky across the following years, so that by The Cairn the reach beyond the throat has gone…