thank you Jack. I have only just found out that most early census records for Ireland were burnt or destroyed. Peter Mack appears on the UK 1841 census as a soldier aged 20, so I think I will have a problem finding his family. But following your link, I have just found some Macks on the 1901 census in Rathaspick Queens the next town/area to Strathbally. These include a 74year old Ellen Mack who could I suppose be a sister in law.