What passes through leads to as compensation for what is blocked a veritable surplus value of code, which falls to the uncle insofar as he causes passage, while he suffers a kind of minus value insofar as he does the blocking (thus the ritual thefts perpetrated by the nephews in the uncle's house, but also, as Griaule says, the augmentation and fructification of the uncle's possessions when the oldest of the nephews comes to live with him).