History of Animals in the Home. Bloomsbury Publishing. p. Preface. ISBN 978-1-4729-0624-3. Turner, Robin (March 2002). "People and nature on St Kilda". Context...
A Natural History of Animals in the Home. Bloomsbury. p. 85. ISBN 978-1-4729-0624-3. McSmith, Andy (23 October 2011). "The pigeons have gone, but visitors...