U.S. Grant Banquet Box from Palace hotel

Submitted by Maurene: Wondering if someone could help me with an engraved "Farewell Banquet" box for Gen. U.S. Grant, Palace Hotel, Oct. 25, 1879 with the guest name of Adam Grant, a prominent figure in San Francisco at the time, engraved also. It has a little damage in the back only where it appears the outer casing, which appears to be tortoise shell, has 3 small areas which have broken off. If you can help Maurene by offering information on this item, please click on the comment button. Thanks!