Me again 
... And it would be fun, if Mab ordered Harry to contact the Merlin and beg him to teach him how to be a better Warden for Demonreach by improving bis magical abilitys. Because there may be knowledge passed down from Merlin to Merlin since the original one createt the wards on the Island. And only he can teach Harry. That would be horrible for both of them. Muahaha.
Anything Harry needs to learn about the original Merlin, he can get through Eb. Eb has Merlin's journals.
