Who is Mr. and Mrs. Dimble from That Hideous Strength and what is their importance?

This couple is part of the group at St. Anne's, and they are the reason Jane comes to know of this group and be protected within it. Sometime before the story's beginning, the Dimbles have acted toward Jane as a set of surrogate parents. Mr. Dimble teaches at Bracton College, and Mrs. Dimble takes a special liking to Jane when she is a pupil of Mr. Dimble's. It is they who tell Jane to go to St. Anne's after she tells them of the terrible dreams she is having. After the battle begins, Mr. Dimble gets a chance to speak to Mark and tries to get him to leave the N.I.C.E., but to no avail. Mr. Dimble is integral to the group because he knows the language of the eldils.