• Series Continuity Error: When Vetinari is informing Moist that Mr Pump will hunt him down anywhere in the world if he tries to escape he points out that although Mr Pump only moves four miles an hour, he never does anything else, so he's moving non-stop and four miles an hour is 672 miles a week...except that it isn't. Not in Discworld it isn't. Thanks to the curious trait of a Discworld week being eight days instead of seven, at four miles an hour is 768 miles a week.

This is wrong and I will remove it. It is said a few times in this book and earlier ones Owned Golems, like Mr. Pump, do have a contractual day off. So on the evening of the eighth day to evening of the next, he wouldn't move to advance on Moist.

Vetinari is just not telling Moist about the day off because he's Vetinari.

That last paragraph could be better. Not going to attempt as I'd be worse than useless.