Griffiths also wrote some catechisms, a hymn-book, and nine or ten original treatises.

The original Greek text is preserved in three 11th-century manuscripts, second-hand or third-hand copies of the original treatise.

Gerard also composed original treatises on algebra, arithmetic and astrology.

He is the author of original treatises of metaphysics, which Descartes would later read.

His original treatises (the best of which are his Greek and Latin grammars), as well as those he edited, remained in use for centuries.

There is debate over the effects of this division on the underlying, holistic manner in which the original treatise was written.

He wrote numerous original scientific treatises based on practical experiments, for the Court of Harun al-Rashid (d.809).

He rapidly progressed to producing his own original treatises on a range of subjects covering both formal and natural sciences.

In this book he included two original treatises about questions of navigation.

In this elaborate and original treatise, he brings together in one place, all different dialectical thinking belonging to the advaitic school.