Letitia Aubrey

Letitia had little or no interest in remaining in Pennsylvania as a young woman. She married once back in England and divested of her Pennsylvania holdings which were quite substantial.

findagrave

The "Manor of Mount Joy" was 7,800 acres of land granted to Letitia (Penn) Aubrey and her husband in 1701. It is a topic of some obscurity whether Letitia spent any considerable time outside of the City of Philadelphia for the short period of time that she lived in the colony.

"The Valley Forge grounds (Upper Merion township, PA) were originally called Mt. Joy Manor after one of the two hills in Valley Forge [Mount Joy and Mount Misery].

It eventually came to be known as Valley Forge for the forge located in the valley between the two hills.

Eventually parcels of the property were sold off by descendants of (William) Penn.

Interestingly, he originally rented it to his daughter and son-in-law John and Letitia Penn Aubrey for one beaver skin a year.."

"They gradually sold off the property, selling†† the last 175 acres in 1730 to Daniel Walker , Stephen Evans , and Joseph Williams. This partnership soon became the "Mount Joy Forge," later becoming more commonly known as "Valley Forge." "
https://www.ushistory.org/valleyforge/youasked/063.htm
https://www.ushistory.org/valleyforge/youasked/010.htm

†† ~• for a more precise chain of title read: https://www.jstor.org/stable/20083559?seq=7#metadata_info_tab_contents