To put the spying into effect, Vasili, Renhalt, and Lena end up on a ridge about a quarter mile from the aerie, where Lena can still feel Ushka's presence at the edges of her mage's sense. She and Vasili communicate briefly from time to time, co-ordinating the movements of their representatives, while Renhalt keeps watch on the surroundings.
The elected representatives, under the influence of Salbard's flight magic, reach Kaber Tor with a minute or two to spare. The tor is a cliff on the west (where Leila and Ushka are coming from) and fairly steep on its other sides; the half-ruined tower which must be housing the targets stands clear of the surrounding pine forest by a clear fifty feet of almost open ground. There is little light from the waning moon and the stars, but enough that crossing the open ground to the tower would be difficult even for (say) a fox, or a cat. A moment's glance shows two humans or humanoids armed with bows near the entrance; a more thorough examination reveals a wolf prowling purposefully at the edge of the forest.
After a quick consultation by their masters, Leila turns provocatrix, with Ushka standing back to await a chance to take advantage of her distractions.
Leila pads over around the wolf, trying to behave mostly like a curious cat in the wild. The wolf catches scent (or senses) Leila at about twenty feet and immediately growls deep in its throat, hackles rising. It neither retreats nor moves forward, seemingly sizing up this intruder before it takes action.
Ushka crouches low to the ground, ready to sneak inside if fur starts flying.
Leila retreats, trying to appear startled, as if this was all perfectly innocent. The wolf continues to growl, but as Leila backs away, it seems to decide against pursuit, instead backing slowly into the cleared space.
As the wolf moves back, one of the people near the door nocks an arrow and moves forward a few paces towards the wolf. "Cover me," he mutters to the other in a pronounced Nova Vaasan accent.
Leila darts forward into the perimeter the dog has created, coming as close as she dares while staying out of bite range. Then she continues forward out of the perimeter, swishing her tail at the creature teasingly as she heads back into the forest for an obtuse (clockwise) circuit around the tower. Neither of the bowmen shoots--probably because neither sees her--but nobody breaks discipline and pursues, either.
Deciding on a different tack, Leila circles almost to the cliff edge and then makes a dash for it, darting from cover to where she sees a gap in the tower's partially destroyed upper level. The man nearer the door turns toward Leila as she makes her dash, giving a muffled shout; at the same moment a owl somewhere nearby hoots loudly. "Somethin' went up the side of the tower!" he says over his shoulder. By his dress and accent, he seems to be a native of these parts, although he doesn't seem to be pure-blooded Rashemani.
Leila finds herself in a rather dark and mostly open space; the stairs leading down are obvious, and there are several pretty decent hiding places along the broken interior walls. Outside, Ushka, at this point, had an idea. She cleared her throat, and then released a
most thoroughly terrifying scream before scampering back into the undergrowth. Maybe if the guards left their posts...
Leila pokes her head into the room below and finds herself looking into a large room--half the tower--with a Vaasi panther-hunting dog rather bigger than the wolf outside entering through a doorway on the far side. Rather than confront it, she ducks through a window and circles around the tower, looking for an way to enter the room on the opposite side. Outside, Ushka sees that no-one is deserting his post--certainly a lot more discipline than one would expect from ordinary bandits. A woman--an elf-woman, yet--appears at the doorway, looking out calmly but with sword in hand.
Neither Leila nor Ushka notices the great grey owl until it is on Leila, tearing at her back and uttering its hunting scream. Superb reflexes keep Leila from falling, but only just; bleeding, she ducks into the nearest window and finds herself surprisingly close to a red-headed woman whose face is covered with dark tattoos. Sharing her senses, Vasili recognizes her as a Forfarian druid.
Leila tries to keep her voice as low as possible. In Balok, Leila says to the woman, "Milady, keep silent! I am here to rescue you!"
The man whips around, longsword in hand; it's not clear if the druidess understood you or not, but she readies her quarterstaff and steps forward, her pale eyes calm. Addressing the man in Vaasi, Leila says, "You have been discovered! Release your prisoner, and my master can arrange for your escape to your homeland!"
The man's only reply is to step forward and thrusts, and Leila disappears like a pricked bubble.



MEANWHILE, BACK AT THE RANCH...
The eavesdropping apparatus had been all but silent for perhaps half an hour when suddenly voices ring out.
"...stairs, see what's up there. Sasha, Tam, keep your eyes open!" Then a new voice, a woman's, in a Forfarian accent so thick you can't make out the words; unlike the first voice (the Nova Vaasan you heard first) she seems more amused than nervous.
The scream of an owl, very faint, and about half a minute later, the authoritative Nova Vaasan voice:
"…just gone. Some kind of spell. Someone smoked us, but…well. We'll just check the deadfalls anyway. All scouts out as we go. On the hop."
"Oh, by the Name..."
"On the hop, cutter, out or down."

Perhaps sixty seconds later, Ushka sees four human men, the dog and the elf-woman depart the tower; one of the departing men whistles to the wolf, who falls in with them at a distance. Two owls fly up from the roof of the tower and disappear into the pine woods after them.