Raising Steam contains a map¹, on which there is a river, which:
- runs from the Ramptops to the Circle Sea;
- has no depicted branches;
- is labelled R. Ankh near Zemphis;
- passes a point denoted Lancre by less than a millimetre.
Given that points denote cities and towns (as opposed to countries) on this map, I presume that the point denoted Lancre refers to Lancre Town, which is known to be located above Lancre River. Since the creator of the map did not draw any branches or denote a separate name, this suggests that the two rivers are identical.
However, other sources (e.g., the L-Space Wiki) claim that the Lancre River discharges into the Ankh.
Hence I am asking: Is the aforementioned map sloppy (in universe) or are Ankh and Lancre two names for the same river.
¹ of which you can find some legally questionable scans online