Hi,  on 1881 census they are still at  6, Prospect Row, Parr:
Thomas HEWS   Head   M   Male   42   b.Galway, Ireland  occ.  Labourer     
Ellen HEWS   Wife   M   Female   42   b.Galway, Ireland   Wife     
Thomas HEWS   Son   U   Male   15   b. Westbury, Shropshire, England
Patrick HEWS   Son   U   Male   14   b. Westbury, Shropshire, England       
John HEWS   Son   U   Male   10   b. Westbury, Shropshire, England      
Mary HEWS   Daur   U   Female   12   b. Westbury, Shropshire, England   
ref: RG11/3738/33/60
probably shropshire 1871?   I don't have access to 1871 sorry.
Regards, Graham