It should be mentioned, that it's a drop from Necromancer. Took me a while to find that, it's only mentioned in Mercian Royal Crypt map description (17 on the map)
This is fixed. The item decription of Boots of Balance now only mention that they come from that necromancer since that is a clearer description then saying it lies "somewhere in the the Mercian Royal Crypt"
double quest links in overview, see attached screenshot
These are automatically generated so this issue is harder to fix. I suspect it happened because this quest could be marked as being in multiple locations since you are required to be in different places to gather the ingredients. It's probably safer to let MikeB have a look at it first though.