"I don't like it, but this afternoon I've told myself I am going to go and get a dress"

In this quote, Antonia Fraser expresses her reluctance towards a certain task, but also her determination to follow through with it. She mentions that she does not like the job, but has decided to go and get a dress this afternoon. This could recommend that the task is not something she delights in or is comfy with, but she has persuaded herself to do it. It might also indicate that she has been postponing getting a gown for some time, however has lastly made the decision to do it today. Overall, the quote showcases a mix of doubt and determination in the speaker's tone.