The desire to know his own mother, or to know about her, was constantly haunted with dread; and in imagining what might befall Mirah it quickly occurred to him that finding the mother and brother from whom she had been parted when she was a little one might turn out to be a calamity. 
His desire to know his own mother, or to know about her, was constantly haunted with dread; and in imagining Mirah's mother and brother, it quickly occurred to him that finding them might turn out to be a calamity. 