HDRKID
Senior Member
Carbon dated to the 15th century the Voynich Manuscript is said to be the work of an alchemist. Perhaps it is an occult book, but it is written in an unknown language and contains drawings of plants that do not exist on earth. Take a look.
http://beinecke.library.yale.edu/dl_crosscollex/SetsSearchExecXC.asp?srchtype=ITEM
http://beinecke.library.yale.edu/dl_crosscollex/SetsSearchExecXC.asp?srchtype=ITEM