The Earl of Morton discovers the Casket Letters. This
correspondence, between Mary Queen of Scots and the Earl of
Bothwell, potentially implicated Mary in the murder of her second
husband Lord Darnley, but their authenticity is a long-standing
point of contention.
Citation:
Editors. "The Earl of Morton discovers the Casket Letters".
The Literary Encyclopedia. First published 01 February 2011
[http://www.litencyc.com/php/stopics.php?rec=true&UID=15062, accessed 22 May 2013.]