==========Spolier Warning==========
No doubt that Sapphire's story is one of the most saddest in Skyrim and everyone is curious about her early life, her parents and the tragedy. She never told anyone about her real name. Recently I found a letter reveals all the secrets of her story. The letter is in a locked room in the house of the blacksmith in Raven Rock. Remember the Shadow Mark beside the door? The blacksmith is a member of the Thieves Guild. Glover Mallory, brother of Delvin, is father of Sapphire Mallory. The letter, written by Glover to Sapphire, reveals the story of how Glover met Sapphire's mother, why he left and what happened later. But the letter wasn't sent so perhaps Sapphire doesn't know anything. The story never ends. Will Sapphire go to Solstheim and see her father?
And here's what I think about Glover. I hate cowards. But it seems at last the coward is not a coward any more. Perhaps he will bring up courage to face his daughter.