Explanatory plaques on the property explain the history of Solitude House, including its Revolutionary War significance:
"The home's first recorded resident was Col. John Hackett who became the superintendent of the adjacent Iron Works established here in 1742 by William Allen and Joseph Turner. Solitude House became the primary residence of the manager of the Iron Works. The first of five generations of Taylors came to reside at Solitude with the arrival of Robert Taylor from Ireland in 1755, who was first a book keeper at the Iron works and soon became manager with the death of Hackett and took residence at Solitude... The early Taylors were all patriots during the Revolutionary War..
"Solitude was substantially remodelled and expanded over the years as the iron works became more wealthy and prosperous. The home doubled in size in 1755, and again expanded and substantially remodeled in the 1850's which gave the home an early Victorian appearance... Some of Solitude's most famous visitors and occupants include George and Martha Washington, as well as General Lafayette, Colonel Charles Stewart, Aaron Burr, and the last royal governor John Penn and his Chief Justice Benjamin Chew who were imprisoned here for 7 months during the Revolutionary War." 
A room in the house is now known as the Penn Room, named for John Penn's imprisonment here in 1777.
The sundial on the grounds (shown below) is an exact replica of George Washington’s in Mount Vernon.
TAYLOR WHARTON IRON AND STEEL COMPANY MONUMENT
Union Forge Park
"Armaments for All Wars"
A half mile down the road from the Solitude house is this monument commemorating the fact that Union Forge/ Taylor Iron and Steel Company produced armaments for all American wars between 1742-1971, which of course includes the Revolutionary War. The small but attractive monument is located in Union Forge Park.
Another half mile down the road leads to this monument at the site of the Old Iron Mines, which were in use circa 1730 -1889. The ore from these mines supplied the Solitude / Union Forge. Revolutionary War cannonballs were made from this ore. 
3.^ Monument plaque states that is was erected by the Historical Society of High Bridge in 1976
4.^ From text on the Old Iron Mines Monument plaque, erected by the Historical Society of High Bridge in 1975
Revolutionary War New Jersey
The online field guide to New Jersey's Revolutionary War historic sites!
High Bridge New Jersey Revolutionary War Sites • High Bridge New Jersey Historic Sites
Solitude House House Museum • Taylor Wharton Iron and Steel Company Monument • Old Iron Mines Monument