I searched the Irish Family History Foundation's database.
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For John Quinn, 1 B rcd exists in Co. Roscommon in 1836. This may, or may not, be your ancestor.
For Sarah Morrisroe, I found 0 B rcds in 1839.
I found 0 M rcds for either John or Sarah in 1860.
Google the Foundation's name to lead you to the database.