Here is a copy of the 1871 Welsh census showing the Robert's Family living in Ffestiniog North Wales, still on Dolgarregddu Street.
However, the family has two more daughters.
They are not on the 1881 Welsh census so they may have got married.
They match in all other ways, except the age of the mother, Mary, is the same as her husband, while in the 1881 census she is listed as being two years older.
This is where you have to have really good eyes!
This is the snip from Ancestry, but it states that John Roberts is born in Ireland!
This is utterly false so I left a comment.
The transcriber read the country above John's, and put that down for him.
Oh woe is me!
But I'm thrilled to have found the Robert's family on two different censuses.
By Loretta Williams Houben