Manly Palmer Hall [P.R.S.] MS. 245. 8 folios. 206 x 162mm. 18th Century. [This is included in the Bacstrom Collection MS. 102, Vol. 14.] The Processes of Mr. John Yardley of Worcester For Transmuting [ ] into [ ] or [ ] Communicated by himself in a letter to a friend in 1716.