When Henry died , Stephen invaded England , and in a coup d'etat had himself crowned instead of Matilda .
Before naming Matilda as heir , however , he had been in negotiations to name his nephew Stephen of Blois as his heir .
When Henry died , Stephen of Blois invaded England , and in a coup d'etat had himself crowned instead of Matilda .
Before naming Matilda as heir , however , he had been in negotiations to name his nephew Stephen of Blois as his heir .