William Seabrooke Cooper, a former actuary and Southeast Baltimore real estate salesman, died of lung cancer Friday at Mercy Medical Center. He was 67 and lived in Upper Fells Point.

He was a Social Security Administration actuary in Woodlawn for more than 30 years before his retirement in the 1990s.

Beginning in the 1970s, he also sold Fells Point real estate.

Born in Baltimore and raised in Phoebus, Va., he earned bachelor's and master's degrees in physics from Morehouse College in Atlanta. He served in the Air Force Reserve in the late 1950s.

Services were held Tuesday.

Mr. Cooper is survived by his wife of 13 years, the former Jan Vinocur; a son, William D. Cooper of Baltimore; two daughters, Susan Cooper and Jenifer Cooper-Melia, both of Atlanta; a sister, Mildred Hammond, also of Atlanta; and his stepmother, Audrey Cooper of Hampton, Va.