Premise: Pine Tree Point was the Adirondack Great Camp on Upper St. Regis Lake of Frederick William Vanderbilt, a director of the New York Central Railroad for 61 years. Vanderbilt maintained residences in New York City at 450 Fifth Avenue, Hyde Park ("Vanderbilt Mansion National Historic Site"), Newport ("Rough Point"), and Bar Harbor ("Sonogee").
Hypothesis: The Vanderbilt residences at 450 Fifth avenue, Hyde Park ("Vanderbilt Mansion National Historic Site"), Newport ("Rough Point"), and Bar Harbor ("Sonogee"), have been in the family for 61 years.