Manly Palmer Hall [P.R.S.] MS. 233. 53 folios. 206 x 162mm. 18th Century. [This is included in the Bacstrom Collection MS. 102, Vol. 6.] [Baro Urbigerus.] Aphorismi Urbigerani or certain Rules clearly demonstrating the three infallible Ways of preparing the Grand Elixir of the Philosophers.