"Oh really?" says Wiglaff, thoughtfully. "Maybe we can take care of that problem for you. We'll be back in a bit!"
Wiglaff will beckon the rest of the party back through the door, and once well away from it explain his plan: do a little more exploration (east of 26), then return to the Mages' Research Collective and tell them we've finished off Fred and Bob. We don't want to reveal the chambers are empty & unguarded till we're fairly certain we've got all the treasure.
[f=32]Wiglaff the Elf, F3/MU2
(M 12", AC 9, HD 4+1, hp 14/14, N) cloak of elvenkind
, battle-axe; light, colour spray
[f=47]Wilibald "Willie" Whitfoot, F1/T1
(M 12", AC 6, HD 1+2, hp 9/9, L) gambeson+helm, shield+warhammer[/f]