1. Harley MS 321, ff 19r-23r Reference (shelfmark): Harley MS 321, ff 19r-23r Title: De corporibus celestis Scope & Content: Rubric: 'De corporibus celestis'; incipit: 'Corporalis mundi machina consistit in duobus'. Decoration: Initials in red. Collection Area: Western Manuscripts Languages: Latin Date Range: 1st quarter of the 15th century Extent: 5 folios.