1. References in books and periodicals Alan Bold, Modern Scottish Literature, 1983, pp 259-60 Douglas Gifford in Scottish Writing and Writers, ed.
2. Separate articles on J.H. John Orr, Dark Horror and Black Humour, in Cencrastus no. 7, Winter 1981-82, pp 26-29 Hugh Macpherson, Scottish Writers: John Herdman, in Scottish Book Collector, Vol. 3, No. 7, Oct.-Nov.