Manly Palmer Hall [P.R.S.] MS. 181. 97 folios. 1297x184mm. 18th Century. ... Collectaneorum et Propriarum quarundam Inventionum Joannis Jacobi Olben Inchoatus Anno Salutis humanae 1669. Laa Civitate Austriae Sub Elevatione Poli 48 [degrees]. gr: 50' 37'' Sole existent in Mp 18 [degrees]. gr: 18' 3''. [Several full page ink illustrations and diagrams.] [Austrian.]