Original sentence: Amateur  Irish historian (and Drogheda native) Tom Reilly has taken this argument further, claiming that the accepted versions of the campaigns in Drogheda and Wexford in which wholesale killings of civilians on Cromwell's orders took place "were a 19th century fiction"
Edited sentence: Amateur Irish historian (and Drogheda native) Tom Reilly has taken this argument further, claiming that the accepted versions of the campaigns in Drogheda and Wexford in which wholesale killings of civilians on Cromwell's orders took place "were a 19th century fiction"