Yesterday, Dr Stephan Edwards posted a report of his latest research regarding the Syon portrait of Lady Jane Grey. Building on his work over the last 3 years, the report contains the results of the dendrochronological tests on the two Syon portraits of Jane.
You can read his full report here:
Some Grey Matter – The Portrait of Lady Jane Grey at Syon House
Dr Edwards will be answering your questions about the Syon Portrait in mid August over at the Lady Jane Grey Reference Guide