Felix

In the novel The Secret Adversary, Felix is a headwaiter at the Ritz, where and Julius Hersheimmer are staying at. After a long day, Tuppence tells Hersheimer that she wants to take a walk in the park and then probably dine upstairs in their rooms as she did not feel like dressing for dinner. Hersheimer says that would be all right--he would ask Felix to choose a suitable menu.