Death record for John Mahon & Anne Kelly Mahon

My gr gr grandparents were John Mahon & Anne Kelly.  They lived in a very small town called Moher, just outside of Ballinasloe. According to the marriage record for their daughter Eleanora, they were still alive when she got married to her 2nd husband Thomas Simmons in 1889.  I have never been able to locate any records for John & Anna other than the mention in the marriage record.  I've tried the National Archives without success.  If anyone can locate a death record for either of them I'd appreciate it very much.

Thanks

Michael Sparks