I'm afraid I won't be able to take part in this GR the way I'd like, because I won't have computer access throughout :-(, but I'll do my best!
JA talks about Mrs. Leigh having taken a severe chill in church three weeks earlier, which became an "inflammation on the lungs". This reminded me that of course, churches were very likely unheated in her time, and going to church in December or January could be quite an endurance contest if the weather was cold!
It made me think of "The Story of the Trapp Family Singers" (the very interesting real-life memoir that "The Sound of Music" is based on), where Maria von Trapp wrote that she and her husband wanted one of their babies baptized at home rather than at church, because she was born during a severe winter, and Austrian churches were unheated in those days (the 1920s).