sentences:  These conferences, which were initially inclusive of historicist and futurist premillennialism, led to an increasing acceptance of futurist premillennial views and the pre-tribulation rapture especially among Presbyterian, Baptist, and Congregational members.Popular books also contributed to acceptance of the pre-tribulation rapture, including William E. Blackstone's book "Jesus is Coming", published in 1878, which sold more than 1.3 million copies, and the Scofield Reference Bible, published in 1909 and 1919 and revised in 1967.Some pretribulation proponents, such as Grant Jeffrey, maintain that the earliest known extra-Biblical reference to the pretribulation rapture is from a 7th-century tract known as the Apocalypse of Pseudo-Ephraem the Syrian.