1976. Information Sheet. Ref. RDG publication: A Journey from Hagar Qim to the Ring of Brodgar. Edinburgh Arts 1976.
1976. Letter (page 2/2) to Demarco from Barrie and Marianne Hesketh, directors of the Mull Little Theatre, Isle of Mull, Scotland. Ref. Edinburgh Arts 1976.
1977. Information Sheet. Lecture by Demarco: From Hagar Qim to the Ring of Brodgar. Ref. Demarco's Edinburgh Arts lecture tour in North America.