Lettie Burd Cowman (March 3, 1870 – April 17, 1960), also known as L.B. Cowman, was an American writer and author of the devotional books Streams in the Desert and Springs in the Valley. Cowman published her books under the author name Mrs. Charles E. Cowman. She was also one of the cofounders of The Oriental Missionary Society (later known as OMS International, and eventually One Mission Society). Early life Lettie Burd Cowman was born on March 3, 1870, in Afton, Iowa to Isaac and Margaret Burd. At 13 years of age, she met her future husband, Charles Cowman, a young telegraph operator. Six years later, on June 8, 1889, they were married. Charles was also one of the co-founders of The Oriental Missionary Society. Lettie and Charles lived in Glenwood Springs, Colorado, for the first year of their marriage. After living there for a year, the high altitude of the Rocky Mountains caused Lettie to become very ill. They were forced to move back to Chicago, where they lived for the next 10 years. While there, they were converted at Grace Methodist Episcopal Church; and Charles worked at the same telegraph office where he had previously worked. One Mission Society Japan On February 1, 1901, the Cowmans left the United States to work as missionaries in Japan. They worked alongside Juji Nakada, a friend they had met at their church in Chicago. In 1902, a friend from the telegraph office, Ernest Kilbourne, joined them to aid their growing ministry. The Cowmans, Nakada, and Kilbourne are considered the four cofounders of the Oriental Missionary Society. Bible Training Institutes The work in Japan continued to grow. By 1903, two Bible Training Institutes had opened in Japan. These schools held classes during the day, and in the evening hosted evangelical services open to the public. Dozens flooded in nightly to hear the preaching of Juji Nakada. A Bible Training Institute was open in Seoul in 1910. The Great Village Campaign It was clear that all four co-founders had a deep burden on their heart for the people of Japan. They wanted to reach as many people as they could with the Gospel. Although they were making huge strides in their goals, Charles was not satisfied. This led to the start of the Great Village Campaign in 1913. His goal was for every person in Japan to hear the Gospel within the next