Fonds consists of correspondence between Milone and colleagues, and manuscripts related to his lab book (Challenges of Astronomy) and to his publication (Exploring Ancient Skies)

The fonds consists of records primarily created or collected by Dr. Milone and Dr. Clark during their multi-decade tenure as co-Directors of the RAO. The records chart the early visions for the observatory and the gradual accumulation of equipment and infrastructure to support teaching and research. Records include correspondence on the acquisition of the land, the purchase of the first telescope (.4 m), subsequent telescopes and mirrors (1.5 m and 1.8 m), the photometry system, and the construction of the domes and the Visitor Centre. The records also include grant applications, budgets and financial materials, and administrative records including meeting notes, agendas and correspondence. Graphic materials document celebrations and ceremonies, and also the various milestones achieved by the acquisition of equipment and construction of various building components as well as teaching activities and outreach including Open Houses.