Hello Yvonne,
The General Register Office (GRO) in Roscommon Town, County Roscommon holds marriage records from 1845 for those of the Protestant faith, and birth, marriage, and death records for all religious denominations from the year 1864.
You can print a marriage application form, fill it out with the pertinent information about Leo Bruton and Mary Byrne, add your credit card number, and then send the form to the GRO. The address for the GRO is found on the application form.
Certificates for legal purposes cost 10 Euros. Photocopies cost 6 Euros. Information on the photocopies will be the same as found on certificates needed for legal purposes.
To access the marriage application form go to the following GRO link:
http://www.groireland.ie/docs/ApplicationMarriagesIrish.pdfMore information about GRO links can be found at:
http://www.groireland.ie/about_us.htmBest of Luck,
Dave Boylan