Final answer:
The provided texts do not mention Mrs. Hallett or a silver teapot, so we cannot determine when Mrs. Hallett promised to part with the silver teapot; more information is needed.
Step-by-step explanation:
The information provided from the excerpts does not contain a direct reference to Mrs. Hallett or a silver teapot. However, based on the context of the provided texts, which seem to detail various aspects of a domestic setting and personal belongings, we can infer that the question might pertain to a reading comprehension or literary analysis scenario. Since the texts discuss gifts and personal items without mentioning Mrs. Hallett or the silver teapot, we do not have enough information to determine when Mrs. Hallett promised to part with the silver teapot. Thus, the correct answer is:
A. We need more information to answer this question.