Barber, who went to China as an Anglican and later became an independent missionary with informal ties to the Plymouth Brethren, is best known for her influence on Nee Tuo-sheng (Watchman Nee). Stationed in Foochow (Fuzhou) along the south China coast, she and others regularly taught a Bible class at White Teeth Rock. Here she had contact with Nee at a very formative time of his life, when he studied for a time at Anglican Trinity College. As a result of her own spiritual struggles, she was able to refer him to books by J. N. Darby, Jeanne Guyon, T. Austin Sparks, and others that had been of help to her. She also had impact on many other Chinese men and women, the most noted of whom was Leland Wang (Wang Zai), who later became a Chinese leader.