Dendrochronolgy is the science of dating wood by the variation in thickness of the annual growth rings in a tree. Good growing conditions during a summer produce wider rings than bad years, and the record has now been pushed back several thousand years.
To be able to carry out a dating, Coralie needs to be able to identify the species of tree that the wood came from, she needs a reasonable number of rings, a number of samples from the same phase of the building and, ideally, some of the sub-bark surface, the last ring formed before the tree was felled, which gives the earliest date when the wood could have been put into the building.
I am most grateful to Coralie for the time she gave me to explain her work. She was looking forward to being involved with the archaeological exploration of this magnificent building, which she thought was the oldest she had ever worked on.
Coralie has an excellent website at http://dendrochronicle.co.uk/
and she can be followed on Facebook at https://www.facebook.com/Dendrochronicle