On the far left hung a shrouded, pulsing mass of dark purple. The image steadied, and the shape became the swarming aggregate of a Tinker Composite, imaging in from Mercantor in the Fomalhaut system. The Tinker had clustered to form a symmetrical ovoid with appendages of roughly human proportions. Next to it (but fifty-plus lightyears away in real space, halfway across the domain of the Stellar Group) loomed the dark green bulk of an Angel. And far off to the right, beyond a vacant spot in the assembly and still showing the margin of rainbow fringes that marked signal transients, hovered the lanky tubular assembly of a Pipe-Rilla. It was linking in from its home planet around Eta Cassiopeiae, a mere eighteen lightyears away.

MATTIN LINK NETWORK COMPLETE, said the same pleasant human voice. THE CONFERENCE MAY NOW PROCEED.

It was a historic moment. The representatives of the Stellar Group were in simultaneous full audio and visual contact for the first time in twenty-two Earth years. Dou-gal MacDougal, conscious that he was about to take part in a singular event of Stellar Group history, adjusted his already-perfect robes and stepped forward to fill the one remaining spot in the tableau of ambassadors. “Greetings. I am Dougal MacDougal, Solar Ambassador to the Stellar Group. Welcome to the Ceres’ Star Chamber. Can you all see and hear me, and each other?”

The question was pure diplomatic formality. The Link computers would have confirmed full audio and visuals before permitting any of the participants to enter link mode. Yes,” said the Pipe-Rilla, in a fair approximation to human speech. “Yes,” echoed the Tinker, and, after a few seconds, the computer-generated response of the Angel Ambassador.

“As you know,” went on MacDougal, “we have called this special meeting to discuss a difficult situation. A recent event here in the Sol system is cause for grave concern, and it could be a problem affecting the whole Stellar Group. We may have to consider unusual — maybe unprecedented — control measures. Naturally, any such decision must involve all members of the Stellar Group. But first, you need to know the background of the problem. For that purpose, I have arranged for you to receive a briefing from two of the principals involved in this matter from the beginning,”