Walter H.E. Jaeger, 80, a retired professor at the Georgetown University law school and a former colonel in the Army Reserves, died of cancer Oct. 11 at his home in Plant City, Fla.

Col. Jaeger was born in Brooklyn and graduated from Columbia University in 1923. He moved to Washington as a student at Georgetown, where he earned bachelor's, master's and doctoral degrees in law and other subjects. He also earned a doctorate at the Sorbonne in Paris.

He joined the Georgetown law faculty in 1934 and remained on it until 1978, when he was named a professor-emeritus. From 1957 to 1970, he was the editor of the 23-volume "Williston on Contracts," a standard text. He also was the author of "Cases on Labor Law" (1939), "Law of Contracts" (1953) and "International Law" (1961).

Over the years, he was a visiting professor at the University of Frankfurt in Germany, the University of Southern California, the University of Chicago, the University of New Mexico and the John Marshall Law School. He moved to Florida when he retired from Georgetown.

During World War II, Col. Jaeger served with in the Army Judge Advocate General's Office in Washington.

Col. Jaeger was a member of the D.C. Bar, the American Law Institute, the Cosmos Club and the Masons.

His wife, Berthe Gilbreth Jaeger, died earlier this year. Survivors include a son, Walter S., of Garland, Tex.; a sister, Dr. Ruth M. Fielding of Plant City, and a grandson.