George Merritt was a businessman from New York

New York

New York is a state in the Northeastern region of the United States. It is the nation's third most populous state. New York is bordered by New Jersey and Pennsylvania to the south, and by Connecticut, Massachusetts and Vermont to the east...

. He owned the mansion

Mansion

A mansion is a very large dwelling house. U.S. real estate brokers define a mansion as a dwelling of over . A traditional European mansion was defined as a house which contained a ballroom and tens of bedrooms...

 Lyndhurst

Lyndhurst (house)

Lyndhurst, also known as Jay Gould estate, is a Gothic Revival country house within its own park beside the Hudson River, located in Tarrytown, New York approximately one-half mile south of the Tappan Zee Bridge on US 9.-History:...

 on the Hudson River

Hudson River

The Hudson is a river that flows from north to south through eastern New York. The highest official source is at Lake Tear of the Clouds, on the slopes of Mount Marcy in the Adirondack Mountains. The river itself officially begins in Henderson Lake in Newcomb, New York...

, which was sold to financier Jay Gould

Jay Gould

Jason "Jay" Gould was a leading American railroad developer and speculator. He has long been vilified as an archetypal robber baron, whose successes made him the ninth richest American in history. Condé Nast Portfolio ranked Gould as the 8th worst American CEO of all time...

 by Merritt's widow, Julia Merritt, after Merritt's death in 1873.

Julia Douglas and George Merritt were married 5 November 1845 in Troy, New York

Troy, New York

Troy is a city in the US State of New York and the seat of Rensselaer County. Troy is located on the western edge of Rensselaer County and on the eastern bank of the Hudson River. Troy has close ties to the nearby cities of Albany and Schenectady, forming a region popularly called the Capital...

 and had six children.

He hired architect

Architect

An architect is a person trained in the planning, design and oversight of the construction of buildings. To practice architecture means to offer or render services in connection with the design and construction of a building, or group of buildings and the space within the site surrounding the...

 Alexander Jackson Davis

Alexander Jackson Davis

Alexander Jackson Davis, or A. J. Davis , was one of the most successful and influential American architects of his generation, in particular his association with the Gothic Revival style....

 to expand the estate. Merritt was the home's second owner, and doubled the house's size in 1864-65, renaming it "Lyndenhurst" for the estate's linden trees. His new north wing added an imposing four-story tower, new porte-cochere

Porte-cochere

A porte-cochère is the architectural term for a porch- or portico-like structure at a main or secondary entrance to a building through which a horse and carriage can pass in order for the occupants to alight under cover, protected from the weather.The porte-cochère was a feature of many late 18th...

 (the old one was reworked as a glass walled vestibule) and a new dining room, two bedrooms, and servants quarters.

Merritt held a patent

Patent

A patent is a form of intellectual property. It consists of a set of exclusive rights granted by a sovereign state to an inventor or their assignee for a limited period of time in exchange for the public disclosure of an invention....

 for a railroad car

Railroad car

A railroad car or railway vehicle , also known as a bogie in Indian English, is a vehicle on a rail transport system that is used for the carrying of cargo or passengers. Cars can be coupled together into a train and hauled by one or more locomotives...

spring.