"Aye, those vampires 'ave been out and about, god bless our souls. I knows that one 'as been terrorising villages to the South, from that err... underground tunnel err... complex, the Underwarrens! Now do you want a room for the night? It's only 2 gold pieces for a room and 1 for a dormitory!"
You realise that he is probably talking about the 3rd son in your family, Hans Eberstark, who used to love playing around in caves as a child and was fascinated by stories of the dark Underwarrens - a twisting mass of underground passageways in Central Adalis, populated by all manner of foul creatures. You thank the innkeeper for this useful information and must decide if you want to buy a room tonight whilst you have the chance.