I can't remember what the name of this book is. I read it a while ago. I just remember that it was a regency novel and the girl was the guy's younger sister's best friend. She got pregnant and he married her. She had a difficult birth and almost died but she delivered a healthy baby girl first. I think that the whole time she was looking for some memoirs or something that he found for her at the end of the novel so that might be somewhere in the title. I know that the details are a little sketchy but I would really appreciate it if someone could tell me the name of this novel.