Garak will watch them until the expiry of the spell, trying to get what he can from his observations of the council and trying to fix it in his mind so Grykee can (hopefully) translate it through his memories later.
When the spell expires, Garak goes to Grykee with this intent, while the memories are still fresh in his mind. If she has already gone to sleep, he too will try to get some rest.
OOC: This will likely be my last post for a few days - I'm moving house, and I doubt I'll have web access before next Tuesday. If anything major comes up before then, feel free to autopilot Garak until I get back.