The man who rescued the cornerstone box when the 1907 Old Sanctuary was demolished showed me the contents of the box. He has kept these remnants for 23 years (even he did not realize that it has been so long). He believes they belong to the Temple and has offered them many times. Many of the documents suffered heavy water damage before demolition and are in bad shape.
I'm working to get the Jewish Historical society to take ownership. They want them. I hope that I can help make this happen. It might be that the materials are too far gone.