Skull keys/Locations

Ultima II
Skull keys may be found at the following locations in Ultima V:
 * The Stranger has to fight Thieves to get them.

Ultima V
Skull keys may be found at the following locations in Ultima V:
 * A tree stump frequented by Shenstone in Minoc housed new skull keys daily.
 * Serpent's Hold (Sold by Kristi for 100 gp)