A) Revelations only
B) Two articles by Oliver Cowdery
C) A Topical Guide
D) Faith inspiring articles by Joseph Smith and his counselors
(C) John’s vision while on the Isle of Patmos
On one of Josephs visit with the Angel Moroni, Moroni states the following:
The sealed part contains the same revelation which was given to John upon the isle of Patmos, and when the people of the Lord are prepared, and found worthy, then it will be unfolded unto them.
Backman, Milton V., Jr. & Keith W. Perkins. Writings of Early Latter-day Saints and Their Contmporaries—Database. Provo, Utah: Religious Studies Center, 1996.