The series Professional Service and Engagement contains three subseries: Heritage / Historic Districts Nominations, Historic District Nominations and Organizations and Offices. These sub series contain materials of McLennan’s various nonacademic activities, along with materials accumulated for reference purposes. Materials are arranged within the subseries alphabetically.

The series Professional Service and Engagement contains three subseries: Heritage / Historic Districts Nominations, Historic District Nominations and Organizations and Offices. These sub series contain materials of McLennan’s various nonacademic activities, along with materials accumulated for reference purposes. Materials are arranged within the subseries alphabetically.