The Mary Brown Channel Architectural Collection contains sketches and drawings for approximately 160 Portsmouth area projects, the majority of the drawings represent residential designs but churches, retail stores, and institutional buildings are also included. Watercolor class projects from her days at Cornell University School of Architecture are also present; however, these drawings are extremely fragile and may require conservation work prior to access. The materials range in date from 1936-2002 with the bulk of the materials ranging from 1936-1950.