 In summer 1190, in one of the numerous outbreaks of disease in the camp, Queen Sibylla and her young daughters died.Guy, although only king by right of marriage, endeavoured to retain his crown, although the rightful heir was Sibylla's half-sister Isabella.After a hastily arranged divorce from Humphrey IV of Toron, Isabella was married to Conrad of Montferrat, who claimed the kingship in her name.