I read this story for the first time over seventy years ago. It made a great impression upon me. I enjoyed the way the story was told and I especially enjoyed the way the case was solved by understanding a principle of psychology. Father Brown was able to see what others were unable to see because of a psychological principle. It was because of the sophistication of the G. K. Chesterton tales, the way the "small dusty-looking Roman Catholic priest," also called "little priest," solved cases, almost like Sherlock Holmes, that I dislike the TV versions of the man, for he seems so silly to me, and his large size and overweight nature and facial features does not resemble the G. K. Chesterton character at all. Indeed, in the TV Brown series, each case is filled with silly events, including that in each case a silly looking police chief with a crumples hat tells Brown that he does not want his help. This makes no sense to me since Brown has solved so many cases for the chief on the TV programs. In contrast, the Chesterton stories have some humor, but it is subtle and intelligent. His tales are told in an intelligent manner, the character developments are interesting, the plots sensible and engaging, and Father Brown acts in a soft manner, not in the heavy-handed manner on TV. “The Invisible Man” is in my view a classic. Briefly, it is about a murder where an apartment was watched in every possible way. Yet a man came to the apartment and killed its occupant, then carried the body out and dumped it in water, and no one saw him come and leave. Why?