From Zeke's place on the 1st Island, go clockwise on train tracks till just past 1st station and on your left (out at sea) is a broken pier/wooden thing which has a shard on it's outermost wooden pole.
rp2000
Got that one ages ago.
I was missing some random one stuck on the side of a buildingin the Warren. Was just about to switch off the PS3 in disgust when I spied it out of the corner of my eye.