Treatise on Medicine translated by John O’Cullinane physician to Donal McCarthy Reagh and his tutor Pierce Ó h-Uallacháin, begun at Kilbrittain Castle 1414.

https://durrushistory.wordpress.com/2014/06/16/callanan-apothecaries-cork-18th-century-and-hereditary-physicians-to-mccarthys/

https://durrushistory.wordpress.com/2014/06/16/callanan-apothecaries-cork-18th-century-and-hereditary-physicians-to-mccarthys/

https://durrushistory.wordpress.com/2014/08/22/jj-james-jeremiah-joseph-callanan-1786-died-lisbon-1829-cork-poet-bridging-gaelic-irelad-with-irish-literature-in-english-aonghus-o-dalaigh-poems/