Museum of the City of New York website. These are from a dinner given by Anna Fitzhugh, in honor of Montgomery and Stone, in 1904 at the Hotel Ansonia in New York.
Fitzhugh was a member of the chorus in The Wizard of Oz, and played a variety of small roles in the show - I posted several pictures of her here in this earlier posting. She left the company in 1904, so perhaps this dinner was given at the time of her exit from the show? The life size centerpiece of the Scarecrow and Tin Man is quite impressive!