464 Proceedings of the Royal Irish Academy. 



some time after about a.d. 1320 ; while the Irish translation of it was 

 written about 1400, giving doubtless time enough for the Tractate to 

 reach Ireland and get translated there. We have a somewhat similar 

 contemporaneous case, that of the famous Rosa MedicincB Anglicana 

 written by John Gaddesden, who died in 1361. Extracts from that 

 work were translated into Irish in the Yellow Book of Lecan in 

 1390. 



