A recasting of Ptolemy’s doctrines on nativities (Quadripartitum III-IV) following the order of the twelve houses, with a final section on the revolutions of nativities. This Compilatio was put together by a scholar who likewise summarised, paraphrased and excerpted a large number of astrological texts in what appears to be an autograph manuscript, one section of which is dated 1507. This scholar is perhaps the ‘Petrus de Rielat⁹’ (?), whose name appears in the colophon of one of these texts (see MS entry). The starting point and the main source of the Compilatio is the Quadripartitum (in Plato of Tivoli’s translation, A.2.1), but the author also refers to the Centiloquium and to other authors, especially Haly Abenragel and Leopold of Austria.

Text ‘(Gloucester, CL, 15) Compilatio libri iudicialis Ptholomei in nativitatibus secundum ordinem domorum procedens… Expedita autem theorica nativitatum secundum canones Alchabitii vel alterius introductoris… Ait itaque Ptholomeus tractato (!) tertio, capitulo nono: Quando aliquod luminarium fuerit in aliquo angulorum figure precise… In prima domo in forma, figura et complexione nati. Forma, figura et complexio nati secundum Ptholomeum (12va), tractatu tertio, capitulo 11, ex quatuor demonstrantur — similiter si dominus prime domus radicis nativitatis fuerit in decima revolutionis, idem iudicabis …us (?) vide in parte et capitulo eiusdem … (?).’

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