Box 1:
- Material created from Primary and Secondary School studies - Certificates of Merit, Chapelton School, Co. of Renfrew, 1932-1935; Church of Scotland, Sunday School, Proficiency in Religious Knowledge, 1935; Certificates of Merit, Trinity Academy, 1937-1941; British Red Cross Society, Certificate, First Aid, 1942; and, news clipping about Leith schoolboy foresters [July-August 1942] with Trinity Academy Forestry Camp handout to participants
- Edinburgh University study / alumnus material - Scottish Universities Entrance Board, July 1943; Class Certificates, 1944-1945; Pass Certificates, 1944-1948; Graduation Ceremonial, 1946, 1948; 195051 Matriculation Card; Photograph and negative - sports team; news clippings - graduations; Graduation photograph; Graduation Ceremonial, 1968; Report of Examiner (Dr. I.C. MacWilliam), 1974, with abstract of candidate Ph.D; Certificate from General Council Trust recognising contribution of Dr. Iain C. MacWilliam, 1990; and Certificate for Carlyle Circle (legacy pledged by Dr. Iain C. MacWilliam), 2002
- 5 x editions of: Journal of the Edinburgh University Chemical Society - May 1944 to May 1948 - showing MacWilliam as a member of the Society
- Edinburgh University Club of London material - booklet entitled 'Edinburgh University Club of London. 1948' which includes 'A short history of the Edinburgh University Club of London, and a list of members; Copy of the Constitution of the Club, 1954; Brief history of the Club, 1985; and, Membership list, April 1989
- Brewing Research Foundation - photographs (staff, and visit by Prince Philip) and newspaper clipping (visit by Prince Philip, and obituary of Dr. A. H. Cook)
- Correspondence, 1947-2013 - includes Dinner invitations
- Cards and certificates - National Registration Identity Card; National Service card; Death certificate (copy); Copies of memorial service, order of service; Dinner attendees, 17th November [no year]; Royal Society of Chemistry, membership certificate, 1997; and, Membership cards of: Caledonian Club; Institute of Brewing and Distilling; London Scottish, 2012-2013; RSC Advancing the Chemical Sciences, 2013; National Trust for Scotland, 2013; Musselburgh racecourse; Edinbirgh - City card; and Council Tax card
- Publications of Iain Coutts MacWilliam, 1960s-1980s - off-prints
- Thesis. D.Sc. (copy) - 'Carbohydrate and other studies related to fermentation', 1968
- Scottish Brewing Archive - printed matter
- Brewing Research Foundation - printed matter
- Institute of Brewing; and, The Centre for Business History in Scotland - printed matter
Box 2:
- 6 x degree or fellowship scrolls, being: Degree of B.Sc., 1946; 2nd class Honours degree in Chemistry, 1948; Ph.D. (Science), 1950; and, Degree of D.Sc., 1968; Fellow of the Royal Institute of Chemistry, 1969; and, Fellow of the Institute of Brewing, January 1988
- 1 x bound copy of the Ph.D. thesis, 'Studies on barley starch', 1950
- 2 x bound copies of the D.Sc. thesis, 'Carbohydrate and other studies related to fermentation', 1968
- 1 x copy of the 2012 members handbook of the 'Institute of Brewing and Distilling'