Find Parqual Fintallas in Undercity.
Well done, [player]. You have passed the first portion of the Test of Lore, but there is still another question to be answered. But that question is not mine to ask.
Seek out Parqual Fintallas in Lordaeron City. He was a great historian for the humans before the Plague overtook him. Now he continues to seek enlightenment, but of a different nature.
He will have another requirement of you before he asks you anything, but you have done masterfully thus far--I'm sure you will overcome his obstacle.