I just spotted
an item on Propnomicon which links to the New York Public Library's
Bittolph Collection of Menus.
The foundation of this collection was donated to the NYPL in 1899 by Miss Frank E. Bittolph, who continued to add to it until her death in 1924; since then the collection has expanded to over 25,000 items spanning 1843-2008. The collection comprises primarily menus from New York City and area hotels and restaurants, but also includes items from England, France and Germany as well as numerous railway and steamship menus.