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I had a quick look for you on www.emeraldancestors.com and found just one entry of marriage for Mary Jane Dilworth but it was to a different man although in Seagoe, and wrong year. Was she the one who married twice? I found a David Porter married to a Mary Ligget in Seagoe on 26 Jun 1863
Record Type Civil Marriage
Date of Marriage 18 Mar 1859
Groom Name george LIGGET
Bride Name mary jane DILWORTH
Church Seagoe Church of Ireland
Parish Seagoe
Civil District Lurgan
County Armagh
Record Type Civil Marriage
Date of Marriage 26 Jun 1863
Groom Name david PORTER
Bride Name mary LIGGET
Church Seagoe Church of Ireland
Parish Seagoe
Civil District Lurgan
County Armagh
I have found Emerald Ancestors and Family Ulster very helpful in getting the details of birth and marriage certificates