I have a problem with getting more quest. I did the nightingale quest and have the armor and did the collect 24 gems quest but now i have no more quest from anyone. The guy who's name begans with a B. just keeps telling me the guild is doing fine and the new leader is good. I ony have completed a total of 3 or 4 quest for the guy before i got the quest chain for nightingale. Am i the leader now? I know when we got the armor he said he didn't want to be leader and offered it to me. Is that it? It seems weird that i became leader so fast.

Speak to Delvin Mallory, or Vex for extra work to become the leader of the thieves guild. They're in the Ragged flaggon.

I did talk to them. Vex tells me to see the guy that recruits you. Delvin i'll have to check on.

what is the last TG quest you completed?

OMG. U have all 24 stones?! My last one isn't be found! To confirm, is there a stone in the Thalmore Embassy, in Elenwen Solar, in a upstairs bedroom??
This is the one I can't find! Im on 360. Help?