Alan III of Brittany

Writers on Norman affairs, he noticed, seemed ready to blame poison for almost any sudden death that couldn't be explained by obvious violence.

The list of supposed victims is long, and when Alan III of Brittany, the guardian of young William, died at Vimutier in 1040, Orderick says the Normans poisoned him.

Count Walter of Montez and his wife Beota died around 1063, and Orderick passes on a rumor that their enemies had poisoned them as well.

When Duke Conan II of Brittany died in December 1066, Orderick made his most elaborate claim.