Thanks Allen. The signatures were in an autograph book with Basil Rathbone, Wallace Beery, Buddy Rogers, Richard Arlen, Otto Kruger, Oscar Homolka, Phillips Holmes, Vilma Banky, Rod La Rocque, Sally O'Neil, Warner Baxter, Janet Gaynor, Robert Montgomery and some british acts.
The nils asther was the one I though was Hunt/Auer.
The strange thing is that I am sure that I have a 2nd signature of the unknown one. Thanks for your input anyway.