OMG internet. After all these years, you can still surprise me. From the Auchinleck Manuscript – “one of the National Library of Scotland’s greatest treasures. Produced in London in the 1330s, it provides a unique insight into the English language and literature that Chaucer and his generation grew up with and were influenced by. It acquired its name from its first known owner, Lord Auchinleck, who discovered the manuscript in 1740 and donated it to the precursor of the National Library in 1744.”
Source: The Thrush and the Nightingale – Auchinleck Manuscript – National Library of Scotland