Ralph Mackin and his wife were a Seventh-day Adventist couple from Ohio, United States. They claimed to experience gifts of the Holy Spirit such as prophecy, speaking in tongues, and even casting out demons. They caused a stir at a local Adventist camp meeting, which was reported in the local newspaper. They later sought the counsel of Ellen G. White, whom Adventists believe had the gift of prophecy. White was initially cautious regarding their experiences, and later came out opposed to them. After leading some meetings at an Adventist church for a time, they pass from prominence in the church.