I always assumed that area of Canton was all built at the same time? Maybe I'm wrong, but the notion that it was simply a case of the wrong signs being put up sounds plausible to me.

As for Abergorki - although the spelling is slightly different, it seems Abergorky is still a district of Treorchy with this building a testimony to that

https://cinematreasures.org/theaters/28029

When we've got a train service up here, Abergorki industrial estate (that term makes it sound grander than it is!) can be seen from the train between Ynyswen and Treherbert stations - Treherbert being the last stop on the line.

There was also an Abergorki colliery;

https://www.welshcoalmines.co.uk/Gla...kiTreorchi.htm

Wonder if the Insole pub in Canton was named after the family mentioned in the article about the colliery?