1911 Encyclopædia Britannica, Volume 9… (1911)
“ He returned to England in the end of 1575, resolved “to live henceforth an untroubled life”; but he was ultimately persuaded to accept the offer of the queen to make him earl marshal of Ireland. He arrived in Dublin in September 1576, and three weeks afterwards died of dysentery. There were suspicions that he had been poisoned by Leicester, who shortly after his death married his widow, but these were not confirmed by the post-mortem examination. The endeavours of Essex to better the condition of Ireland were a dismal failure ”
