In that case, John Ballard must have been the father of all Mary Harris's children too even the ones that hadn't been born yet ,and Sarah Weavers !

the will in brief,
Elizabeth gets £1200. JBL gets £800
£2000, to Mary Harris wife of Mr Harris , ships carpenter, and £1000, her son and £500 daughter and £500 to any other children she had.
then Elizabeth get another £100, Mary gets £300, £600 to the late Sarah weavers children,
then about another 30 random people get a few hundred apeice, then Elizabeth gets to share the profits and rents of a house with his brothers servant ?
other points re baptism /christening
Commissioner Joshua Evans states that JBL's father was a Presbyterian and Elizabeth had JBL re done in 1817 to be church of England
JBL says he is due revisionary interest from the £1200 from his grandfathers will