(possible spoilers) new londo lore + what might have been

Is it just me or does new londo seem a bit devoid of interesting background lore. we know about the knigs who fell to the dark and about the darkwraiths who gained the lifedrane but went a bit insane but thats more to do with the abyss. New londo wasn't always so dark and destroyed. and what of the 3 sealers. i'd like a bit of background on them too. the only bit of lore i have to go on is the sorcery remedy which stated that new londo used to be home to some unique healing sorceries. Wish there were a few more in game. Seems only faith builds can heal as summons without using humanity. unfair i want healing sorceries!

Well ok.. info on the three sealers!!:

You have Ingward, who gives you the key to the seal. There is also a sealer by the name of Yulva, she is the corpse you find the sealers outfit on. Finally the third sealer has been speculated to be the one who stands by Lautrec when you invade him. He has his helmet removed as the helmets were a sign of their dedication to their role.

I may be slightly incorrect but i'm sure this is right.

Ps. Yulva was attempting to disinfect blight town.

knew about about yulva and igward but i hadn't thought of the third sealer being the sorcerer with luterec. that's something interesting at least. Is that all the knowlage we have?

Other people have looked into it extensively and I dont think anyones came up with more than that.