Holger makes sure that Finnur did a good job on binding the acolytes: he gently yet thoroughly tugs on the ropes and checks whether all knots are tight and secure. He stands up satisfied, places his foot against the shoulder of the cultist that was wounded before, nods at Memphisto and gives him a firm push: ”Wake up, zealot. Tell us your name and your intentions!”
The cultist is rudely jolted awake. He blinks with his eyes, disoriented for a moment, then realizes he is tied up and when his eyes flash back and forth a couple of times between the other bound cultists, the party and Van it doesn’t take him long to figure out what’s going on...
”So that’s how it is, traitor..!” he hisses, ignoring Holger’s questions and directly addressing Van. ”I always knew you weren’t a true follower of the Overlord of the Flaming Eye! Wait until Father Faskull has freed the Xul and learns of your betrayal, he’ll have you hanged for this!” He twists and turns, trying to wriggle himself loose, eventually gives up and spits in Van’s direction, then grinning at the party: ”The Xul will be vengeful, you sinners!”
I disregarded Dahl's intention to search the acolytes as Lisglen already searched them and found nothing of interest.