It will be mentioned tomorrow, but since nowadays even the mention of it is so sensitive, I tried to avoid any pictures showing the sides that are most 'discussed' (not really discussed, it's really more fighting than discussing, but alright), just to avoid a sense of "omg that's so offensive!" that would make my skin crawl (and the whole discussion about that which has really been held enough in the Netherlands, let alone an international forum)
The story is mostly right by the way, although the most commonly told origin of the 'helpers' is that they were slaves who were bought and then immediately freed by the bishop, who (by their own choice of course) then employed them for actual payment and such.