In the story, ethos is used to persuade the audience as to John's credibility as a doctor. And however one might judge his wife's behavior, John's credibility is consistently challenged since his prescription of rest does more harm to Jane than good. It is pretty clear that the narrator (Jane) initially goes along with her husband's (John's) "expert" advice. But it is also clear that she continually and increasingly disagrees with this advice. In the opening paragraphs, she states her initial plight:
John is a physician, and perhaps -- (I would not say this to a living soul, of course, but this is dead paper and a great relief to my mind) -- perhaps that is the one reason I do not get well faster.
In other words, since John is a doctor (and a man), he has authority in their relationship. Jane's brother, also a doctor, agrees with John. She must, therefore, obey his orders. Also note that for Jane, writing is a "great relief" and yet her husband forbids her to do it. It doesn't matter to John...
(The entire section contains 2 answers and 800 words.)