Helie, aided by the Count of Angers, attacked and took possession of Le Mans, and besieged the castle: two Norman officers in command had, in the meantime, received orders from the new King of England to treat with Helie; and when he presented himself before the walls, they requested him to clothe himself in his white tunic, which had gained him the surname of the White Knight.

With this he complied; and on his re-appearance before them, they received him with smiles, saying,-- "Sir White Knight, you may now rejoice to good purpose, for we have reached the term so long desired by you; and if you have a good sum of money for us, we will make a good bargain.

If we chose to resist we have still arms, provisions, and valour; but the truth is, we want a legitimate master to whom we can dedicate our service.

For which reason, noble warrior, knowing your merit, we elect and constitute you henceforth Count of Le Mans." Helie, after this, took part against Robert and the Count of Mortain at the battle of Tinchebray, where he commanded an army composed of Bretons and Manceaux.

He distinguished himself wherever he appeared in battle, and died in 1110, and was buried in the abbey church of La Couture, where his tomb was formerly seen.