Morton Riddle III, 77, a retired partner in a Leesburg insurance business, died of cancer June 29 at Loudoun Hospital Center.

Mr. Riddle, who lived in Leesburg, was born in Jacksonville, Fla. He graduated from Virginia Military Institute and served in the Army during World War II. He first moved to the Washington area in the mid-1930s.

From 1946 until he retired in 1984, he was a partner in Moore, Clements & Co., a Leesburg insurance firm.

He was a former member of the Leesburg Town Council.

He was a member of the Leesburg Rotary Club and St. James Episcopal Church in Leesburg. For many years he had played his ukulele at the annual Loudoun Hospital Center Follies.

His first wife, Frances "Chan" Riddle, died in 1977.

Survivors include his wife, Elizabeth Willcox Riddle of Leesburg; two children of his first marriage, Morton Riddle IV of Lovettsville, Va., and Emily Guignon of St. Louis; two sisters, Polly Clements and Bessie Meade Tynes, both of Leesburg, and five grandchildren.

ROBERT N. DAIN

Air Force Realty Specialist

Robert N. Dain, 67, a retired civilian real estate specialist for the Air Force, died of lung and liver cancer July 2 at his home in Alexandria.

Mr. Dain was born in Indianapolis. He attended Indiana Central College and Indiana University.

He had worked 34 years for the Air Force before retiring last year. He spent the last 10 years of that time assigned in Turkey to conduct real estate negotiations on behalf of the Air Force in Turkey, Greece and Crete. He was first assigned to the Washington area in 1973, and he worked at Air Force real estate headquarters at Bolling Air Force base before being sent to Turkey.

Earlier he had worked for the Air Force in Alabama, Illinois, Missouri and Alaska.

Survivors include his wife of 40 years, Joyce Dain of Alexandria; three children, Chere Dain-Marlo of Cahokia, Ill., Robert D. Dain of Reston and Lanny R. Dain of Winchester, Va.; a sister, Eulalah Dain of Indianapolis; a brother, Edward T. Dain of Unionville, Ind.; and nine grandchildren.

ANTOINETTE M. HUMBERT

French Diplomat's Wife

Antoinette M. Humbert, 87, the wife of a retired French diplomat and a resident of Silver Spring since 1972, died June 27 at her home after a heart attack.

Mrs. Humbert was a native of Lyon, France. She came to the United States in 1929 and settled in New York City.

In the early 1930s, she married Jacques Humbert, a French commercial attache. She accompanied him on his assignments to New York, Chicago, Ottawa, Washington from 1950 to 1955, and to Saåo Paulo, Brazil, and Nairobi.

She had been a member of Alliance Francaise de Washington.

In addition to her husband of 58 years, of Silver Spring, survivors include two sons, Richard Humbert of Bethesda and Philippe Humbert of Montclair, N.J., and four grandchildren.