Established by William F Friedman to reseach the Voynich Manuscript, and in existence 1944-6.

Some details, can be found here [1], which lists the known members as:

  • Robert A. Caldwell
  • G. E. McCracken
  • Thomas A. Miller
  • Frances Puckett, later Frances Wilbur
  • Mark Rhoads
  • William M. Seaman

The minutes of the FSG can be found here [2].

Another mention here.

See also Second Study Group.