This book is a Korean translation of the "Welbon Korea Mission Documents" series organized and compiled by Priscilla Welbon Ewy, granddaughter of Sadie and Arthur Welbon, from materials saved by their son, Henry G. Welbon. Sadie and Arthur Welbon were pioneer missionaries to Korea from 1899-1928. The diaries, letters, photos, and other documents collected during their service in Korea are chronologically put together to provide a vivid and accurate history in Korea mission field.