Things You Never Noticed VI: The Undiscovered Detail

[hroþila]

He means some of the hanging corpses, specifically the blue-haired one with the hood (i.e. the elf with the spyglass in #705) and the one in a purple robe and cloak on the left, and the short-haired strawberry blond(e) on the right.

That would leave only the other elf from #705 unaccounted for, assuming elvish squads consist of four people and that no other teams were deployed. Probably the polymorphed spy in the hobgoblin command tower? Would require some multiclassing, since the spy was said to be a rogue and this elf is seen casting Animal Messenger. I doubt they escaped, at any rate.