[citation needed] Her daughter believed that her mother's essay written about her pride in being an American brought her to the attention of the FBI.

[2] Markward worked undercover for almost seven years, a time that was stressful for her because she was shunned by friends and family because of her activities with the Party.

[6] Markward testified before the House Committee on Un-American Activities on July 11, 1951, that Annie Lee Moss, Maurice Braverman, and about 240 other people were Communist Party members.

In the list of members she did provide, there appeared to be a connection between Party membership and civil rights activism; several people whom Markward accused were less involved with communism and more concerned with picketing segregated areas of the city.

Mrs. Markward: I don't believe the Progressive Party could have been organized without the energy and activity of various Communists in Maryland and the District of Columbia.

[8] Mary Stalcup Markward contracted multiple sclerosis early in her life, which caused her to retire from the FBI.

Later, FBI officials refused to acknowledge her, and retroactively taxed the income she received as an undercover agent.

He was replaced by Phil Frankfeld ... She also named Sheppard Carl Thierman[11] and Annie Lee Moss.