Eric gave her small reassuring smile, silently tellig her that he had a plan. 

Quietly walking into the captain's quarters, Eric sneaked into with quiet footsteps as he spotted the God hunched over his organ that seems to be infront of him. Knowing that Hades seemingly had the ability of clairvoyance, he smoothly used quills to move a dominant strand of his white-gray beard out of the way of his cloak. The huntsman figured that if he touched Hades personally, he would certainly know that he was there and awaken. Able to move the strands, he spotted the key in his cloak. Holding the one quill in his mouth, he reached into his pocket and took out the rolled up drawing of the key. Being able to take the real key quickly, he filled in the empty gap with the drawing. Taking the key in hand, he silently made his exit. 

Out on the deck, he noticed Silena loosening one of the row boats, in order to take his escape. He approached her while strapping the key on some string and putting it around his neck.