Compromise; it set an eight-hour departure time. Terminals in the shape of rings, pens, earrings, brooches, articles of clothing - and the in-built versions, neural laces - woke startled Culture personnel all over the Orbital and the wider system, insisting on relaying their urgent message. So much for keeping everybody happy with a week’s leave . . .

The Sleeper Service accelerated smoothly away into the darkness, already well clear of the system. It began to Induct, flittering between inferior and superior hyperspace. Its apparent real-space velocity jumped almost instantly by a factor of exactly twenty-three. Again, the Yawning Angel was comforted to see, spot on. No unpleasant surprises. The superlifter Charitable View raced after the fleeing craft, its engines unstressed, energy expenditure throttled well back, also threading its way between the layers of four-dimensional space. The process had been compared to a flying fish zipping from water to air and back again, except that every second air-jump was into a layer of air beneath the water, not above it, which was where the analogy did rather break down.

The Yawning Angel was quickly customising thousands of carefully composed, exquisitely phrased apologies to its personnel and hosts. Its schedule of ship returns, varied to reflect the different courses the Sleeper Service might take if it didn’t remain on its present heading, didn’t look too problematic; it had delayed letting people venture far away until the Sleeper Service had sent most of its own fleet out, an action even it had thought over-cautious at the time but which now seemed almost prescient. It delegated part of its intellectual resources to drawing up a list of treats and blandishments with which to mollify its own people when they returned, and planned for a two-week return to Dreve, packed with festivities and celebrations, to say sorry when it was free of the obligation to follow this accursed machine and was able to draw up its own course schedule again.

The Charitable View reported that the Sleeper Service was still proceeding as could be expected.

The situation, it appeared, was in hand.

The Yawning Angel reviewed its own actions so far, and found them exemplary. This was all very vexing, but it was responding well, playing it by the book where possible and extemporising sensibly but with all due urgency where it had to. Good, good. It could well come out of this shining.

Three hours, twenty-six minutes and seventeen seconds after setting off, the General Systems Vehicle Sleeper Service reached its nominal Terminal Acceleration Point. This was where it ought to stop gaining speed, plump for one of the two hyperspatial volumes and just cruise along at a nice steady velocity.

It didn’t. Instead it accelerated harder; that .54 figure zoomed quickly to .72, the Plate class’s normal design maximum.