A New Canaan couple involved with historic preservation on Wednesday announced that it has entered into a contract to purchase the 1735-built farmhouse on Ferris Hill Road that had been slated for demolition this week. Emily and Tom Nissley “will hold the title while a preservation easement is placed on the property with the help of the Connecticut Trust for Historic Preservation,” according to an email that Tom Nissley sent Wednesday to the local press corps. “It is anticipated that the house will be rented as soon as possible and will also be placed on the market for sale to a buyer who appreciates the historic value to the town of New Canaan,” Nissley said. The development marks a positive bookend to a very busy three months for preservationists, who quickly mobilized when the 2.14-acre property’s owner in March filed an application with the New Canaan Building Department to demolish the saltbox structure, following more than one year of unhappy ownership. That owner, Max Abel, joined in a petition Wednesday to the state Historic Preservation Office to have the home at 8 Ferris Hill Road listed on the State Register of Historic Places, according to Nissley.