Warning: Spoilers below for the adventure, Menace of the Icy Spire (albeit a modified version).
Taking a brief rest to deal with some logistical stuff, the party determines that some of the items they’ve found in the last few sessions are magical and what they do. Of particular interest is the parchment found upon the Shadar-Kai…presumably the Bairwin mentioned in the parchment. It turns out that this parchment is magically linked to another and whatever happens to one (e.g., written upon) happens to the other. Ah ha…this Bairwin can receive messages/instructions from someone. The party contemplates how this might be used to track down the individual(s) involved with Bairwin.