The work was written in Latin in or soon after AD 840 by an anonymous author who is conventionally called Astronomus, the Astronomer or the Limousin Astronomer, due to his many detailed comments on astronomical matters in the work.
The work was written in Latin in. The work was soon after AD 840 by an anonymous author. The work was due to his many detailed comments on astronomical matters in the work. This anonymous author is conventionally called Astronomus. This anonymous author is conventionally called the Astronomer. This anonymous author is conventionally called the Limousin Astronomer.