The second parcel, 659 acres of rugged terrain bordering the eastern edge of the forest west of Tuxedo Park, has already been purchased from New York University for $860,000.

WHAT - 3-bedroom house HOW MUCH - $335,000 This house is on 30 acres bordering Jefferson National Forest near Virginia Polytechnic Institute and State University.

Eight years after Clarence Mackay's death in 1938, his family sold off the 50 acres bordering what is now Harbor Hill Road to the Army, which wanted to use it as a communications headquarters.

Another property on the market is a 100-year-old three-bedroom farmhouse on 89 acres bordering Genegantslet Lake in McDonough, 45 miles north of Binghamton.

DETAILS - On 554 acres bordering Bridger-Teton National Forest, this development is aimed at active second-home owners.

In these projects, more than 50 percent of the property, covering 120 acres bordering Long Island Sound in East Marion, one of the North Fork's easternmost hamlets, would be preserved.

A fourth purchase in North Castle, in which the county bought 23 acres bordering Cranberry Lake Park for $3.6 million, has prevented the building of as condominium development next to an important drinking water source.

There is a waiting list, in fact, of charities that want to hold benefits at the estate, which sits on 5.5 acres bordering Beverly Hills and Bel Air.

Mr. Kennedy lives with his second wife, Mary Richardson, and their three young children in Bedford, N.Y. (he has two older children from a first marriage) on 10 acres bordering a 30-acre lake.

Thomas Curtis, John's brother, owned 150 acres bordering the south branch of Assiscunk Creek.