The Book of the O'Shiels, written in 1657–58 by Pádruic gruamdha O Siaghuil. The book was written in Connaught, where Pádruic says he and his brother, Pádruic Óg, were in exile (no doubt under pressure from Cromwell), and he prays God to recall them both to their ancestral home in Ibh Eachach (i.e. Iveagh), probably in Co. Armagh. He seems to have belonged to the branch of the O'Shiels who were physicians to the MacMahons of Oriel. The copy of the Materia medica takes up pages 322–444. It contains a little more than half the text, and breaks off with the heading ‘Gladiolus’, our Chapter 145. Una de Bhulf prints five extracts from this MS in Lia Fáil i 229–233, corresponding to our Chapters 3, 8, 17, 56 and 61.