Narrator's use of the Professor's first name

Throughout the first six chapters of the novel, Godfrey St. Peter is referred to as either the Professor or as St. Peter; but on pages sixty-four and sixty-five, the narrator switches that and calls him by his first name. This happens as he is considering his wife's intimate relationships with his sons-in-law, particularly Louie, "With Louie, Lillian seemed to be launching into a new career, and Godfrey began to think that he understood his own wife very little"(64). The conversation Louie and Lillian were having was about Rosamond, and the narrator begins to examine the relationship between the Professor and his wife through this scene. While it is well known that he and his wife had grown apart over the years, the Professor actually seems wistful over the distance between them. The narrator's switch to an informal reference shows the sensitive nature of the information being imparted to the reader in this scene. After Louie leaves and the Professor begins conversion with his wife, he is again referred to as St. Peter and he resumes his position opposite his wife as the moment of reflection ends and he is once again distant from his wife. It will be interesting to see if there are other moments of clarity inside the mind of the Professor and if the narrator again switches to using his first name as a signal to the reader that it is a moment of inner thought for him.