The Walns were engaged in language study in Portugal from1928-1929 before going to the Chilesso Station of the ABCFM West Central Africa Mission, where they served from 1929 to 1962. Duane Victor Waln was acting director of the Currie Institute in Dondi for a brief period, but the Walns were primarily stationed at Chilesso.
Duane was engaged in evangelistic work, but also supervised construction and operation of the mission schools, hospital, and residences. Marian Ingram Waln (known as "Peggy") ran a Home Economics School for women and was much occupied by hospitality for mission colleagues and visitors. The Walns had two sons: Duane, Jr. and Robert.
From the guide to the Duane and Marian Waln Papers, 1905-1962, (Yale University Divinity School Library)