Maybe Elizabeth had a previous marriage? Still no sign of Harry or Sarah I see at this time, which is a bit strange. The dates look correct though.
Thank you for all the efforts.
PS: Now looking at the dates, I suspect that Catherine's middle name is Sarah.
Almost 10pm here, and a work day tomorrow, thank you for your ongoing efforts, I have been busy trying to match photographs to people tonight as well, so an extremely encouraging evening.