Hatto has retained his influence during the entire reign of Louis the Child and on the king's death in 911 had been prominent in securing the election of Conrad, duke of Franconia, to the vacant throne.

When trouble arises between Conrad and Henry the Fowler, duke of Saxony, afterwards King Henry I, the attitude of Conrad is ascribed by the Saxons to the influence of Hatto, who wishes to prevent Henry from securing authority in Thuringia, where the see of Mainz has extensive possessions.

He ihad been accused of complicity in a plot to murder Henry, who in return had ravaged the archiepiscopal lands in Saxony and Thuringia.

Hatto dies on May 15, 913, one legend saying he was struck by lightning, and another that he was thrown alive by the devil into the crater of Mount Etna.

His memory will be long regarded in Saxony with great abhorrence, and stories of cruelty and treachery will cling to his name.