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This reference is made out of a piece of the high resolution map by the wyrd sisters. It has estimated locations of Serault and its neighboring Marquisate town, Alyons. I didn't draw the border between the two but you can imagine it. I have it between Serault and Andoral's Reach, such that Alyons does not have much contiguous land and only has the 3 vassal villages nearby. That Marquisate is currently more powerful than Serault, and has additional lands that are not contiguous elsewhere. I forget what the term for that is, but there is one.
Also featured: the Last River that is meant to flow through Serault and make it a river port, plus some other rivers I made up and many newly named lakes. I didn't name every lake, but I named a lot of lakes if you see an unnamed lake, look for a near lake, add "petite" to its name, and there you go. I realized part way through they should probably be Lac __ if named in "Orlesian" and Lake __ if named in "Common" ... just assume people call them by both depending.
Wherever you put it, it is important that the Last River actually ends up flowing down past somewhere relevant, like near Andoral's Reach, and crossing the Imperial Highway! This is because if it was just a river that went or came from nowhere useful, like the marshes, it wouldn't be passable for commerce to be coming into Serault.
I am assuming the source of the Last is in the Blasted Hills, snow melt or one or more springs or both, and flows south-south west. The River Dawn I have it intersecting with in the Tirashan is a river I made up and it starts with a natural spring and ends meeting up with the Last and then going underground right at that point.
Since making this I have seen people put Serault on the little scrap of river leading into the lake I have named Lake Nahashin. I kind of accept that, because yes that way you don't need to imagine the original canon maps left off a whole river, but really? A passable series of rivers and lakes through a marsh area? I am not a river boat captain or anything so I may be wrong but I assume it wouldn't ever have been popular with trade through a Marsh. Maybe someone who does that is imagining the "Nahashin Marshes" label really only represents scattered marshes between the lakes, and not a major nearly unbroken stretch of marsh. Anyway I like my Last River also because it gives me a good spot to put Alyons that also lets Alyons be relevant and more important than Serault at this point. Also it lets you put Serault actually away from the lakes and marsh, which are never mentioned in The Last Court, and right next to the Tirashan woods, which are repeatedly mentioned as being "right out the back door" from Chateau Serault.
Why is it, and Serault for that matter, missing off the actual official maps?
1) because it's way out west and nobody cares. That explains Alyons I guess, too. 2) it was purged as part of the "Shame of Serault" shunning which would be a few generations back. Alyons got left off too because they took off the Last River to punish Serault and impact its trade. The merchants they still get are hold outs and people really into getting their hands on the best glass. Perhaps authorities felt nobody would follow a ban on Serault glass, so it was better to deter trade and effect the punishment using official map changes.
You can also see I added some made up villages for Serault to have as vassals, each with their own local lord or lady (styled "baron" informally, if they want, even if official petty titles are banned) ... or Ser if a chevalier or general knight.
Find more about those villages, and the draconologist's outpost, Chateau Estival, HERE.
More about the rivers and lakes, HERE.
More about Alyons and its villages HERE whenever I make that post.