Manly Palmer Hall [P.R.S.] MS. 166. 12 folios. 206x162mm. 18th Century. [This is included in the Bacstrom Collection MS. 102, Vol. 7.] Joel Langelott. Letter to The Curious, Discovering Secrets of great moment &c. &c. By Joel Langelotus M.D. Translated by S. Bacstrom 1798.