The command gland is behind the wing case and the wing case was still attached to a dead animal in a market row. Vell had it open inside eleven minutes with one working arm, a garrison lamp, plus a woman holding the plate back who had no business lifting anything.
A broadcast organ is a transmitter and a transmitter is a piece of architecture.
That is the sentence the whole of the next hour rests on, and it is the reason a man who dismantles things was the right person kneeling in that market row. The gland does not think, does not choose, and does not know what it is saying.
It carries a signal somebody else's body wrote, at a frequency the animal's own chest sets. Take the organ apart carefully and the signal survives the animal, which is a thing nobody had needed to know until that hour.
[Command gland: dismantled.]
[Signal architecture: recovered.]
[Carrier requirement: resonant chest cavity, Grade 4 minimum.]
