Original sentence: This was attributed both to a Thorel de Campigneulles, "a now largely unknown writer of third-rate moralising novels;" and Henri Joseph Du Laurens, who is suspected of having had habitually plagiarised Voltaire
Edited sentence: This was attributed both to a Thorel de Campigneulles, "a now largely unknown writer of third-rate moralising novels;" and Henri Joseph Du Laurens, who made a good habit of plagiarising Voltaire