Ms. astronomical treatise; written and illuminated in Naples, Italy, in the last quarter of the 15th century.
Scribe: Giovan Marco Cinico, who signed Ioannes Marcus Velox in the colophon on fol. 76v.
Decoration: prefatory page (fol. 4v) of purple vellum with Carafa emblem of a steelyard (balance) between two stretcher-circles; title page (fol. 6) with illuminated initial and white vine border containing the Carafa emblem and arms (gules 3 fesses argent on shield); 4 astronomical marginal illustrations.