1. It pretends that the court is able to investigate those reasons in great depth, whereas in practice it is not able to do so, and in any event that investigation is not going to save the marriage. BNC
2. In Villette, other characters than the narrator are described in great depth, not only for their relationships with Lucy Snowe, but as characters in their own right. BNC
3. He has investigated the subject with tenacity and in great depth, enabling us to understand a good deal about Russian and Teleut attitudes and activities. BNC