Erdenheim Farm

[3] Aristides Welch purchased the Pearl from Atherton Blight, a Philadelphia attorney, and created Erdenheim Stock Farm in 1862, on about 150 acres east of the Wissahickon Creek.

Widener had architect Horace Trumbauer alter and expand Carson's "rustic" house into a 60-room Colonial Revival mansion, "Erdenheim" (1916–17), and design a number of matching barns and outbuildings.

He became a major figure in Thoroughbred horseracing, and served as president of the National Museum of Racing and Hall of Fame.

Upon his death in 1971, he bequeathed Erdenheim Farm and his entire estate to his nephew, Fitz Eugene Dixon Jr. (1923–2006).

Widener's cousin, William McIntire Elkins (1882–1947), purchased an adjacent 95-acre tract and hired Trumbauer to design his mansion, "Briar Hill" (1929–30).

[19] Elkins's widow sold the mansion on 47 acres to Dr. Stephen J. Deichelmann in 1948, who converted it into Eugenia Hospital, a psychiatric facility.

Fitz Eugene Dixon Jr. raised thoroughbred horses, Aberdeen Angus cattle, and Border Cheviot sheep.

The farm is divided into five tracts: The Hill at Whitemarsh, established in the early 2000s as a retirement community, bought Eugenia Hospital, intending to demolish it and built a 55+ age-group cluster-housing and luxury apartments.

Although 2018–2021 are being executed for Hawk Ridge development in an area where the Agnus cattle used to graze and is owned by the Hill at Whitemarsh.

Given its location on the border of Philadelphia, it may be considered the "Central Park" of the region to which it is preserved for all to enjoy and exist in its likeness for decades to come.