In a book edited by R Clemens, Yale University Press have recently published a new summary of this mysterious document (see go.nature.com/2dlns1c).
Radiocarbon dating shows the original manuscript is from between 1404 and 1438. Of course, there is a possibility that the parchment version may be a forgery.
Wilfrid Voynich, who died in 1930, bought the manuscript from a Jesuit archive in Italy, then took it to London and then to New York.
The origin remains unknown, and the meaning of its strange alphabetic calligraphy is still uncoded. The illustrations are of bathing women, dubiously recognisable plants and maps of stars.