Other sources suggest that Eustace was present with William at the Malfosse incident in the immediate aftermath of the battle, where a Saxon feigning death leapt up and attacked him, and was presumably cut down before he could reach William.
Sumber-sumber lainnya menyatakan bahwa Eustace hadir dengan William di dalam insiden Malfosse segera setelah pertempuran, dimana seorang Sachsen yang berpura-pura mati melompat dan menyerangnya, dan diduga ia dibunuh sebelum dapat mencapai William.