Dezallier d'Argenville's Théorique in its English version introduced the Ha-ha, the invisible fence, to widespread English practice, although Althorp already had one in 1697.
In its English translation, Dezallier d'Argenville's Théorique popularized the concept of the Ha-ha, a concealed boundary, among English speakers, although Althorp had implemented this idea as early as 1697.