Several books appear. However, none of which seem to be a "list of magical items stored in the archives". The books instead appear to describe research on items of magic that are, or at least have been, in the Conciri's possession. The Archive Field does not seem to keep track of items stored.
An older set of records details fey creatures in the Vincari Forest attacking and sometimes kidnapping people nearby, including children. The records focus on the Conciri's involvement in aiding the Marcandrians in their efforts to locate the missing individuals. These efforts ultimately led to the apparent eradication of the fey in the Vincari Forest. Additionally, a few tomes describe items and beings, including fey, that were retrieved and kept by the Conciri for study.
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A newer tome records the enlistment of a magister by House Grimani to prevent fey attacks on people entering the Forbidden Forest, as the House wanted to exploit the forest's resources. The tome includes a section describing information the magister has gotten from the locals, noting that it was not uncommon for people, including children, to disappear in the forest. It was presumed that the fey killed them and dragged their corpses away, with few attempting to search for the missing out of fear for their own lives. The author notes a peak in disappearances around 1325 AD. Despite attempts to communicate with the fey and find ways to keep them at bay, the magister nearly died from a hostile encounter at the forest's edge. He ultimately abandoned the request, concluding that it was not feasible to eliminate the fey without an expanded and more focused effort.