Le Guast.--His Character.--Anjou Affects to Be Jealous of the Guises.--Dissuades the Queen-mother from Reposing Confidence in Marguerite.--She Loses the Favour of the Queen-mother and Falls Sick.--Anjou's Hypocrisy.--He Introduces De Guise into Marguerite's Sick Chamber.--Marguerite Demanded in Marriage by the King of Portugal.--Made Uneasy on That Account.--Contrives to Relieve Herself.--The Match with Portugal Broken off