Roger's nationality, year of birth, and education are unknown.
In this treatise Roger criticizes the calculations of Gerland as used in the standard text of the time, and draws on Hebrew and Arabic learning.
It is probable that he and the Roger Infans attested in charters at Hereford (1186 - 1198), are one and the same.
[2] A subsequent more detailed analysis of all 22 extant manuscripts of Judicial Astrology was undertaken as a PhD thesis by Chris Mitchell at the University of Leicester.
[1] Roger's importance rests largely as a transmitter of the scholarship of Adelard of Bath and the ancient authors, including Robert Grosseteste, with whom Roger shared a household in his latter years at Hereford.