[3] Daniel's first major work, his Liber Uricrisiarum, tells readers how to diagnose illnesses by uroscopy, the analysis of a patient's urine.
[3] In addition to its uroscopic content, Daniel's Liber Uricrisiarum includes medieval scientific knowledge about astronomy, anatomy, embryology, and more.
[3] Daniel's second major work, his Aaron Danielis, is an encyclopedia of herbs, other medicinal substances, and select medical terms.
The text describes the nature and medicinal uses of plants, gums, metals, and fungi, and defines a number of unfamiliar medical terms.
[5] The Additional manuscript was once part of the library of the noted antiquary Dr. Cox Macro[6] and is also mentioned by Richard Pulteney in his Historical and Biographical sketches of the progress of botany in England, from its origin to the introduction of the Linnaean system.