This is what I have in my database (after reading your message I think there is an error in my records though):
John Barton Abell, born 1817, died 1855, married:
#1 Mary Jane Spalding who was called "Jane" and was the sister of Archbishop Martin John SpaldingThey had a daughter: Mary Teresa Abell born 18 Nov 1845 and married Robert Benjamin Lancaster.If John B. & Mary Jane had more children, I don't have them in my records.
#2 Maria Clark who was born June 1815, died Dec 1893.I have Maria's mother as Eleanor Spalding Riney, and father unknown.If her maiden name was Riney, then was she married before John Barton Abell to a Clark?I have two children listed for John and Maria: Eleanor and William, but I do not have birth dates for them.
John B. & Maria C. Abell are both buried at St. Augustine's Catholic Cemetery, Lebanon, Marion County, Kentucky
I do not know where John's first wife is buried, nor the dates of birth & death for her.