I tried a bit of a new approach today. Hope ya fellas like it!
Excerpt from The Last True Norman, written 1346(1)
(Scene: The BOY-DUKE plays with his siblings at stage right, unaware of DE BEAUMONT pacing at stage left. DE BEAUMONT is clearly occupied with a large map of Normandy placed upon an oaken table, around which are simple chairs. A SQUIRE stands nearby, silently. It is late in the evening.)
A MESSENGER enters and bows to DE BEAUMONT.
MESSENGER: (struggling to hold back despair) My lord. I come with grave news. The Bastard of Brittany has defeated our army at Mortain. Less than a thousand are returning to Rouen. The rest have either fled to their homes or lie dead.(2)
DE BEAUMONT stares at the MESSENGER for a moment, then slumps down into a chair at the head of the table, his eyes fixed on the map and tinged with hopelessness(3).
DE BEAUMONT: (muttered) We cannot hold Rouen. All is lost.
He shakes his head, dispelling the demons, and looks towards the SQUIRE.
DE BEAUMONT: (gently) Boy.
SQUIRE: Yes, sire?
DE BEAUMONT: Prepare ten of our fastest horse, and tell the servants to prepare Duke Robert and his brothers and sisters for travel, and find four men-at-arms you trust to accompany them and the Lady Matilda. I want them on the road to Flanders by dawn.(4)
The SQUIRE nods and rushes out of the room. DE BEAUMONT turns his attention to the MESSENGER.
DE BEAUMONT: Find Lady Matilda and tell her to prepare to leave, on the orders of the ducal regent.
The MESSENGER nods as well, and runs off. DE BEAUMONT watches the BOY-DUKE and his siblings wistfully for a moment, then turns away.
DE BEAUMONT: (to himself) At least they are not lost.
Excerpt from The Saga of Konan, Duke of Brittany
...Mortain was saved.
Despite his great victory at the fields of Mortain, Konan was angered and aggrieved. It was only a Pyrrhic victory in his mind. More than a third of the original Breton army he had begun his campaign with had died or been gravely wounded in the fight, whilst Aimery of Thouars himself had lost an ear and two fingers to some mad Norman swordsman. Though Aimery proclaimed himself to be in able shape nevertheless, the black flame of hatred, which had only simmered in Konan's heart during the many cruelties he had suffered at the hands of William and his compatriots, grew to a raging bonfire which could only be satisfied with Norman blood. It was here at Mortain that he was to begin his transition from the jolly duke he had been to the grimly lawful king he was to become, with that first most terrible act: the execution of Roger de Montgomerie for rebelling against his liege lord. (5)
Aimery of Thouars and the rest of the duke's advisers desperately attempted to counsel him against this just act, believing it would cause chaos among the Norman parts of the army. But Konan was stern in his conviction, and Roger de Montgomerie was executed at sunset on June 10, 1067. Whilst many of de Montgomerie's retainers began to grumble uncomfortably, fearing for their own lives, the men of Maine, Avranches, and Alencon were ecstatic, most of them being far more loyal to their homes than to the Norman dukedom. These lands would later become the heart of Breton support in Normandy, as Konan continued to punish the Normans.
The duke, always merciful as well as just, pardoned the men of Mortain, as they were simply following their lord. With these grim acts done, the army rode for Rouen. By June 18, the great Breton army, which was now almost as much of other lands as it was of Brittany, surrounded Rouen. The Bretons were surprised to find that the city itself was open to them, and the citizens greeted them not with violence, but only sullen silence. Rouen Castle, too, was opened, though a foul stench did wash out of it. Konan was the first man to step through the gates and explore the castle, followed by Aimery and the Breton light horse. There, they found a most horrifying sight; Robert de Beaumont and the remaining one hundred of his supporters, lying dead in the great feasting hall(the rest having been allowed to return to their homes). It was clear that they had all had one final feast together, then had drunk poison or ended their lives in whatever way they saw fit.(6) One survivor was found deep in the dungeons: Wulfnoth, son of Godwin, brother to Harold the Stalwart, King of England. (7) Konan, disgusted and horrified by this act, ordered his men to start a fire in the castle.
It remains only as a blackened ruin.(8)
Notes
(1) A quasi-morality play authored by an anonymous Norman supporter in Rouen, in which de Beaumont, after the defeat at Mortain, is confronted by various personified values and spectral beings before making peace with his own inevitable death.
(2) This is a dramatic ploy. In reality, several thousand escaped, but most scattered and formed small bandit groups in the countryside that Konan would later have to suppress.
(3) Yes, these are the actual stage directions. Yes, I know it's melodramatic. What else would you expect of a medieval playwright?
(4) Flanders, if you remember, being Matilda's birthplace and the ancestral home of her family.
(5) Yes, Konan's evolution to hardline justicemonger is something I haven't yet brought up, but it will happen.
(6) I know that many of you will find this cliche or unrealistic; personally, I don't. After all, there is no hope for the Normans; most are dead; their only possible leaders are either completely demoralized or too young to actually lead; and there is nowhere to run, not for even this small force. If it makes you feel better, though, go ahead and imagine that this is a propaganda thing and that de Beaumont and his men actually escaped into exile with Matilda and her children.
(7) Finally, Wulfnoth arrives....as a side character.

He'll be more important soon, worry not.
(8) I promise we won't stay this horribly grim for THAT long.