Dead man's hair * recover 4 hairs from lv4 skeletons*
 

Where are these skeletons?

& where is the bat cave?

thank you for your help

Skeletons of all kinds can be found in the cave just past the gypsy on Tortuga. The bats (for the level of bats i'm assuming you need) are just inside the thieves den. Once you enter the cave past the Gypsy on Tortuga, go right, down the hill and another cave entrance will be on your right, that's the Thieves den. Bats just to the right as you enter.

I added this to another thread as well, but when you want a general idea where the beasties are located, refer to this chart. Also, the forum search feature will find many of the answers you are looking for.

Loot Hard!