The information re: Catherine Donnelly is available on registers.nli.ie. subject to the National Library of Ireland terms of use. (In case anyone else can use it) Ancestry's citation is: National Library of Ireland; Dublin, Ireland; Microfilm Number: Microfilm 09486 / 13, Ireland, Catholic Parish Registers, 1655-1915
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May or may not be the correct Catherine Donnelly, but 1815 vs. 1816 and Mulligar, Meath 1800-1816 seemed like a close match. (Of course, I can find nothing on her parents and was a little surprised to see Maurice as an Irish name.)
Good to hear from you and I hope you are doing well!
