Margaret Barrows Arnold, 93, a founding partner of the Washington real estate firm Arnold Bradley Sargent Davy and Chew, died March 11 at her home in the District. She had pneumonia.

Mrs. Arnold, who was known as Marnie, worked in real estate for J.F. Begg & Co. before joining with other women to start Arnold Bradley Sargent Davy and Chew in the early 1970s. She remained active in the firm until about a decade ago. The firm merged with Washington Fine Properties about two years ago.

The daughter of an Army officer, Margaret Barrows was born in El Paso, Tex., and grew up partly in the Washington area. She graduated from the old Gunston Hall private school in the District and attended St. John’s College in Annapolis.

Among her early jobs, she taught fashion and comportment for the modeling agency John Robert Powers in New York and was a fashion coordinator at the old Woodward and Lothrop department store in Washington. In the early 1950s, she co-hosted “The Tail-Waggers,” a TV show focused on animal care.

Her first marriage, to Thomas Morton, ended in divorce. Her second husband, William P. Arnold, died in 2005 after 56 years of marriage. A stepdaughter, Julia Arnold, died in 2006.

Survivors include a daughter from her first marriage who was adopted by her second husband, Anne Arnold Constable of Washington; a stepson, John F. Morton of Annapolis; and three grandchildren.

— Adam Bernstein