The tone seems to be about death. Throughout the story, everything seems dark, sad, gloomy, and depressing. Bad feelings are associated throughout the text like it is leading up to for something terrible to happen. For example in the beginning it tells us about the coffin that was made when doodle was born.
The use of descriptive words helps add to the tone of the story. Using words like bleeding, die, tombstone, unbearable, and trembling help set up how the story is going to play out.
Through imagery, the author gives us a mental visual which can give us emotions about the story. For example, in the beginning of the story it says, "The five o'clocks by the chimney still marked time, but the oriole nest in the elm was untenanted and rocked back and forth like an empty cradle." This gives us a very gloomy vibe when we picture it in our head. This sets up the story to be very sad and dark.
the baby room is empty
The author presents the story in a narrative form of writing. This is a narrative story because the author presents the information in a way that tells a story, whether it is real or imaginative.
I think that what the author is trying to get at here is that pride and the drive to not be embarrassed can be harmful. If it wasn't for the narrator being embarrassed to have a disabled brother, then Doodle may not have died. The author really emphasized this idea in order to create a theme.