I don't own Narcissa. Wish I did. None of the others for that matter. In my Word version, Narcissa's writing is in size 16 Amienne, Bellatrix's in size 14 Blackadder ITC and the dates are on the right hand side. Just to give you an idea of what I believe their handwriting to be like. This is from right before when they go to see Snape...In case you hadn't realised...
19th July, 1996

Dearest Bella,

Come with me if you will. If you do not, I am going alone. Do not try to dissuade me. Lucius is in Azkaban now. You have been in that awful place. You know what it is like. And the house feels so empty without him. It is like it has lost a part of itself. It was always quiet here, but once it was silence, now it is just tension. I cannot take it Bella! He cannot take away the only thing I have left. Severus will help, I know he will. I cannot...I cannot let him take my dear Draco! For revenge on Lucius, do not try to tell me otherwise. It is the only reason why Draco has been chosen. Any other could have done it. I will not let anyone steal my entire family, my whole life, not even the Dark Lord. I am going tonight. You may come if you wish but do not expect me to change my mind.

From your loving sister, Cissy x

19/7/96

Narcissa.
Do not be such an idiot! That is exactly what you are. Do you honestly think you can trust (and I spit the name) Severus Snape? Of course you cannot! He is a traitor, an underhand spy, a double agent. Though I dread to say it, I believe the Dark Lord is wrong to trust him. You will disobey direct orders by going to him, let alone telling him. Be proud of Draco! Do you know what I would give to have the honour he is being bestowed with? I would gladly die, and hand over any family I had in the bargain. After all, it is all for a good cause, for, as Dumbledore would say, the greater good.
I will come with you whether you write back or not, only to show you what a moronic idea this is.
Bellatrix

Bellatrix,
If that is the case, then I go alone. I have never been given orders, I refuse to obey if it comes to this.
Death would be welcome compared to the anguish in my heart. You know nothing of pain.
I had only wished you would remember the strength of blood.
Your sister, Narcissa.