Editors. "The Earl of Northumberland harries the Scottish border". The Literary Encyclopedia. First published 01 November 2010
[http://www.litencyc.com/php/stopics.php?rec=true&UID=14498, accessed 09 March 2014.]
The Earl of Northumberland harries the Scottish border for the English, in a continuation of the low-level aggression that exists almost ceaselessly between the two neighbouring countries.