Design drawings by Andrew Mahaddie, later Bo Mahaddie, covering the duration of his career, including his higher education at Washington University, St. Louis, Missouri, USA. The early work includes some for Skidmore Owings and Merrill, plus drawings from Pasadena and Altadena. The majority of the collection covers Mahaddie's time with Milton Keynes Development Corporation in the 1970s, working on landscape proposals and the city park. There is also work from when Mahaddie was self-employed as BoCo, and his time with Conran Roche and YRM architecture firms. The materials are plans, concept drawings, proposals, elevations and axonometrics. The last series is made up of smaller projects for no identified company and those projects which are unidentified.