A miscellany of medical lore and recipes, etc., in the hand of James Jenkins, a surgeon, of the Ruabon area: Hanes Owain Farchog [Purgatorium S. Patricii, see Studia Celtica, 8/9 (1973-4), 121-94, esp. 134] (pp. 1-27, beginning wanting); Breuddwyd Pawl (pp. 27-42, end wanting); ‘Pwy a fu farw ac ni aned irioed’ and similar questions [Studia Celtica, 30 (1996), 197-222, esp. 213-14] (p. 43); englynion, etc. (pp. 45-6); a list from memory of patients (from Ruabon, yr Hob, Chirk, Oswestry, etc.), suffering from either broken bones or wounds, who had been treated by James Jenkins (pp. 49-53); ‘Pasol asgwrn sydd ynghorff gwr a gwraig ... hyny o esgyrn o gymal i gymal a ffheindies if James Jenkins yny Sersant Haol yn Llunden ...’ (pp. 55-61); other medical lore and recipes, in Welsh (pp. 62-3, 65-75, 77-87, 89-105). A memorandum on p. 89, written by the scribe in the shaky script of old age, is dated 1608.