At Exbury Gardens there is a Domesday Yew. Although very old, going back to the fourteenth Century, it certainly does not go back to the Domesday book in 1086. Also in the gardens is a tree that was felled in the storms of the 1990s on which the tree rings demonstrate that it was a foot in diameter at the time of the American Revolution. The greatest set of tree ring data comes from the Bristlecone Pines in the White Mountains of North America. History back to 7000 BC van be traced there.
What I want to know is whether it works at the equator where there is no winter.