This manuscript contains a copy, on pages 65134, of the same version of the Materia medica as the other Ó Longáin manuscripts (below). A colophon on page 134 states that it was written by Micheál Óg Ó Longáin for his own use in Cuil ui Murchadha, near Curracha Chiopain, in Musgraidhe, Co. Cork, in 1794.