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I assume you have the specifics on the civil marriage record (see below) and the civil birth records for the children of Edward and Catherine. I located civil birth records for eight of the nine childrenchildren: Patrick 1877 Martin 1878 Ellen 1979 Winifred 1883 Catherine 1885 Margaret 1886 Anne 1888 and Peter 1890. I
On Roots Ireland I found the likely baptismal record for Edward Lally in 1849 and Margaret in 1857. See below.
Is there additional information we can assist with?
You may want to add Edward and Margaret's emigration story to our XO Chronicles site in the Islandeady parish page. https://irelandxo.com/ireland-xo/history-and-genealogy/ancestor-database
Name:Edward LallyDate of Birth:
Date of Baptism:15-Apr-1849Address:BeltraParish/District:Islandeady RC parishGender:MaleCountyCo. Mayo
Father:Patrick LallyMother:Winifred McgreavyOccupation:
Sponsor 1 /
Informant 1:Peter KellySponsor 2 /
Informant 2:Anne Mcmanamon
Name:Margaret MctigueDate of Birth:
Date of Baptism:18-Jan-1857Address:DogeraParish/District:Islandeady RC parishGender:FemaleCountyCo. Mayo
Father:Patrick MctigueMother:Mary ClarkeOccupation:
Sponsor 1 /
Informant 1:Michael ClarkeSponsor 2 /
Informant 2:Margaret Hyland