You will find a marriage transcript free on familysearch.org free of charge
Edward Herbert married Bridget Kennedy on the 23rd January 1865 in Silvermines, his father was John Herbert and her father was John Kennedy, the original marriage would give you normally the address before marriage for each.
Herbert is not a common surname and should be easy to trace, I would associate it with Templemore.
If he was Roman Catholic, you will find a match for a baptism of a Edmond Herbert son of John Herbert in Templemore RC records, the name Edmond and Edward are often interchangeable
As you said, the children are born in Silvermines, they are all baptised there, you can find transcript in tipperarynorth.rootsireland.ie (there is a fee)
I will list them here :
Honoria 1865
Bridget 1867
Mary 1870
Margaret 1873
John 1875
Anne 1879
Sarah 1882
Michael 1884
I would go and visit the Silvermines Church if I were you and look for headstones, also try to contact the parish office/ parish priest. A copy of the marriage certificate can be ordered throught a researcher like me (I charge ?10 + ?4 per cert, so if you only get one certificate it costs ?14, 2 ?18...etc) or online for ?20 I think on certificates.ie, researcher's copy are usually ?4 if you get it directly when you visit the GRO research room in Dublin.
transcripts of local graveyards can be found in the Tipperary Studies in Thurles free of charge, you can contact them on the internet throught their website www.tipperarylibraries.ie search for local studies
Also you could search the land records, in particular the Valuation records, to trace exactly where the Herbert family lived if you don't have surviving relatives in situ.
I hope you enjoy your visit in 2014.
Cecile Mulcahy
Prof. Researcher