How did a Balrog get beneath Moria and when?

[Ksenia]

I know that this is an old post but I hope that somebody sometimes checks if sb wrote sth.I'm writing because I need help.I'm writing my MA thesis about archaisms on the basis of Tolkien's books,and I have problems with finding staff connected with it.if somebody has sth interesting or is able to help me please conntact me on my email adress xenia_87@wp.pl