Poppleton History Society
- For residents of Nether and Upper Poppleton, near York. Their Archaeological Project includes field-walking, identifying finds and surveying sites and buildings. Events, publications, contacts.
- http://www.poppleton.net/historysoc/

Clifford's Tower - Massacre at York (1190)
- Historical article about Clifford's Tower and the massacre of Jews in the 12th century.
- http://ddickerson.igc.org/cliffords-tower.html