1980. Slate quarry near Blaenau Ffestiniog, North Wales. Edinburgh Arts 1980 visit to the studio of David Nash.
1976. Catalogue. Page 7/29. RDG 10th Anniversary Exhibition. Ten-year record of the gallery's activities 1966-1976.
1970. Letter (page 2/2) from Demarco to Willi Fleischer, Cultural Officer of the City of Dusseldorf. Ref. Strategy: Get Arts.