What interests me about the 1881 census is the address
Graigalfa Road, Eglwysilan, Pontypridd
This is where the couple married.
It's PROBABLY Graig Yr Helfa Road, it's between Glyntaf and the Common (the mountainside above is Eglwysilan) - Rhydyfelin is the next village down, but about 2-3minutes walk
There are a couple of references to Graigalfa (or Graig Alfa) in newspapers (mostly connected to Dr William Price) and it was recorded in maps
https://historicplacenames.rcahmw.gov.uk/placenames/recordedname/bb36dc21-88bd-4162-a28b-d87a77436298As you say - same as Graig y Helfa Road now
