Assailed by a concerted conspiracy not to pay rent and harassed by taxes and investigations of the Attorney General, the landed proprietors gradually sold out their interests. In August 1845, seventeen large landholders announced that they were willing to sell. Later that year, Stephen IV agreed to sell his rights in the Helderberg townships. His brother, William, who had inherited the "East Manor" in Rensselaer County, also sold out his rights in over 500 farms in 1848. Finally, in the 1850s, two speculators purchased the remaining leases from the van Rensselaers.