When I was in the process of writing ALTERED DESTINY, I did a lot of research into Scotland and its customs. While I didn't use this fact, it's one of many that I found fascinating.
Coronation 1306, Scone, Scotland
The Stone of Destiny stolen by Edward 1. The Earl of Fife imprisoned. His 21yr old daughter, Isabella hurried to Scone in his place, found Robert already crowned. The ceremony was performed again. Such was the importance of the Earl of Fife's role.