- Fonds2023-002 - Marinus Endenburg Fonds
- Series02 - Marinus Endenburg: OSA historical documents
- Item01 - 1959c OSA Draft Proposal for OSA Clubhouse
- Item02 - 1959 OSA Annual Dinner, Wanderers Club, 14th October 1959
- Item03 - 1960 OSA Annual Dinner, Wanderers Club, 8th September 1960
- Item04 - 1961 OSA Fourth Annual Dinner, Wanderers Club, 19th September 1961
- Item05 - 1963 OSA Sixth Annual Dinner, Hyde Park Hotel, 23rd October 1963
- Item06 - 1963c College: Method of Acceptance of Pupils [circular]
- Item07 - 1966c St Stithians College [prospectus]
- Item08 - 1968 OSA Eleventh Annual Reunion Dinner, Sunnyside Park Hotel, 18th September 1968
- Item09 - 1970 OSA Twelfth Annual Dinner, 16th September 1970