The movement which began in response to the special needs of nurses in the early part of the century has endured to the eve of the next. What has enabled the continuance of this para-church movement maintained and supported by nurses for nurses for 85 years? An examination of the historical records would suggest that a combination of factors may have contributed. In addition to a sound foundation and intensive period of consolidation following its inception, the organisation has maintained a relevant ministry and demonstrated the ability to meet changing conditions and needs.