Near Port Deposit in Cecil County, Maryland — The American Northeast (Mid-Atlantic)

F. Donaldson Brown Estate

Photographed by Devry Becker Jones (CC0), June 21, 2026

1. F. Donaldson Brown Estate Marker

Inscription.
Frank Donaldson Brown (1885-1965), a former DuPont and General Motors executive, developted the DuPont Analysis, a return on investment (ROI) formula, and revolutionized the world of finance in 1914. Brown bought the former dairy farm in 1936 and built a 40-plus room Colonial Revival-style mansion, seven car garage, greenhouse, stables, pool, and unique fountain on this property which overlooks the Susquehanna River.

Erected by Maryland Department of Transportation; Maryland Historical Trust.

Topics and series. This historical marker is listed in these topic lists: Architecture • Industry & Commerce. In addition, it is included in the Maryland Historical Trust series list. A significant historical year for this entry is 1914.

Location. 39° 35.982′ N, 76° 5.422′ W. Marker is near Port Deposit, Maryland, in Cecil County. It is at the intersection of Bainbridge Road (Maryland Route 222) and Mt. Ararat Farm Road, on the right when traveling east on Bainbridge Road. Touch for map. Marker is at or near this postal address: 703 Bainbridge Road, Port Deposit MD 21904, United States of America. Touch for directions.

Regionally,

Paid Advertisement

Click or scan to see
this page online

this marker is in Greater Wilmington, on the Eastern Shore,

and in Greater Philadelphia.

It is also in the American Mid-Atlantic,

on the Delmarva Peninsula,

in the Tidewater,

and in the Chesapeake Bay Region.

Globally, it is in the North Atlantic Region,

North America,

the Western Hemisphere,

the Western World,

and the Anglosphere.

Historically, it finds itself in what was once one of the original Thirteen Colonies

and also the Antebellum South.

Other nearby markers. At least 8 other markers are within 2 miles of this marker, measured as the crow flies: USNTC Bainbridge (approx. 0.6 miles away); U. S. NTC Bainbridge (approx. 1.1 miles away); Rich History of the Lower Susquehanna (approx. 1.1 miles away); Naval Training Center Bainbridge, MD (approx. 1.2 miles away); Veterans Memorial (approx. 1.2 miles away); Bainbridge Naval Training Center (approx. 1.2 miles away); Adams Hall (approx. 1.2 miles away); Washington Hall (approx. 1.2 miles away). Touch for a list and map of all markers in Port Deposit.

Photographed by Devry Becker Jones (CC0), June 21, 2026

2. F. Donaldson Brown Estate Marker

Credits. This page was last revised on June 28, 2026. It was originally submitted on June 28, 2026, by Devry Becker Jones of Washington, District of Columbia. This page has been viewed 6 times since then. Photos: 1, 2. submitted on June 28, 2026, by Devry Becker Jones of Washington, District of Columbia.