Mary Berkeley Reed Royce, 73, the daughter and wife of Army generals and the granddaughter of a famous army doctor, died at Walter Reed Army Hospital Sunday of a heart ailment.

Mrs. Royce was the granddaughter of Dr. Walter Reed, the Army surgeon who discovered that yellow fever, a scourge of the tropics, was borne by the mosquito. Yellow fever took the lives of hundreds of American soldiers in Cuba and of soldiers and workers in Panama, during the construction of the canal there, until Dr. Reed's discovery made it possible to control the disease. The medical [WORD ILLEGIBLE] where Mrs. Royce died bears her name.

Mrs. Royce was born at Fort Law- [WORD ILLEGIBLE] Wash. Her father was Maj. Gen. Walter L. Reed. She grew up at Army [WORD ILLEGIBLE] in the United States and attended Holton-Arms School in Washington. She also lived in Panama and France when her father was stationed in those countries.

In 1931, she married Charles H. Royce, now a retired brigadier general in the Army. They lived at posts in this country and also in China, Germany and Japan. They established their home in Washington in 1953.

Mrs. Royce was a member of the Colonial Dames, the Daughters of the United States Army, the board of the Army District Hall and of the House [WORD ILLEGIBLE] Mercy. She also was a member of Christ Church in Washington.

In addition to her husband, of the home in Washington, survivors inlcude a son, Army Lt. Col. James B. Royce, of Fort Hood, Texas, a sister, Mrs. J. K. Monro, of Marlborough, Wiltshire, England, and two grandchildren.

The family suggests that expressions of sympathy be in the form of contributions to the Memorial Fund, Christ Church, Washington, D.C.