Women’s Missionary Union. From her election as corresponding secretary in 1888 until she left that postion in 1906, Armstrong continued to exert her influence in shaping the Union, both in its publications and missionary offerings. She was instrumental in instituting the famous Lottie Moon Christmas Offering among Southern Baptists. Perhaps more than any other person in the Convention’s history, Armstrong helped advance the cause of Southern Baptist home and foreign missions. Talented, but at times