I am doing a Family Heirloom quest for Vilkas in Broken Oar Grotto, but I can't locate the long bow for him. I have already cleared the grotto, but the bow is not on any of the enemies or in the chests. Does anyone know where to find it? Thanks!

Follow the arrow? Look on the local map?

Okay, this is not meant as an insult to the OP, but when I read the reply, I instinctively started singing this: http://www.youtube.com/watch?v=BYCaoUGeQ14

Loaded from an earlier save and started the mission again - he sent me to a completely different location. I guess I had already completed that quest for Skjor, and couldn't retrieve the same item for Vilkas. Problem solved, albeit very confusing!