Grave of Protestant missionary Mary Campbell, located in the Bangkok Protestant Cemetery, Bangkok, Thailand. Campbell worked in present day Northern Thailand, which was called "Laos" during her lifetime. Kenneth Wells writes of her death, "In 1881 Mary Campbell drowned while on a journey from Bangkok. While bathing in the river at sundown she stepped off into deep water and the strong current bore her beyond help." from Kenneth Wells, "History of Protestant Work in Thailand, 1828-1958," Church of Christ in Thailand: Bangkok, 1958, p.74