Of course, he won't let him go. Why would he? It was obvious from the start that there was no hope of getting a ransom from the merchant. The boy's fate has been sealed for a long time, just as the fate of a mouse caught in a cat's paws is sealed. When a cat plays with a mouse, it escapes, only to find itself back in the cat's claws, and this repeats over and over again, because from the mouse's perspective, there is neither a cat nor a game – only life, freedom, which are so close, yet so unattainable – it is completely incomprehensible to the poor rodent's mind. From the cat's perspective, the outcome is perfectly clear.
e si ieu muoir, er mi grans deliuriers