Yes, this anthology does seem to follow our four little rules, and so, since there has been no objection raised at all this whole time, I will say that this wiki deems The Casebook of the Manleigh Halt Irregulars a valid source for in-universe articles, and as such, stories within it may have their own individual pages.
This decision rests on the assumption none of the stories within contain any references to elements or characters to which Obverse Books do not hold copyright to. Thanks to everyone for participating, and for sticking closely to our four rules the whole time.