William M. Chadbourne, a lawyer who served as campaign manager for Fiorello H. LaGuardia, died yesterday at Harkness Pavillion. He was 85 years old. Leader in Corporate Practice Headed His Own Law Firm —Backed Civic Causes. Mr. Chadbourne, who headed his own law firm and was a member of many exclusive clubs, once spent some time in Tombs as a result of an row. The disturbance took place in 1933 when he was heading Mr. LaGuardia's first campaign for Mayor on the Fusion ticket. Mr. Chadbourne had vehemently protested the action of a Democratic election board official, who, the lawyer said, was “helping people with their votes at a polling place.” According to the Democrat, Mr. Chadbourne rushed into the polling place shouting, “I'll show you gorillas and gangsters who's boss around here!” Mr. Chadbourne was arrested on a charge of disorderly conduct. Mr. Chadbourne, who at the time was president of the Honest Ballot Association, was acquitted. Mr. Chadbourne also managed Mayor LaGuardia's second and third campaigns. Mr. Chadbourne was a supporter of Theodore Roosevelt during Roosevelt's 1912 campaign for President on the Bull Moose ticket. In later campaigns his fellow workers dubbed him “Bully.” This stemmed not from any autocratic tendencies, but rather from his oft‐repeated favorite expression of approval, an expression also favored by Roosevelt, “Bully. my boy.” Mr. Chadbourne was born in San Francisco in 1879. He attended Harvard, whose first president—Henry Dunster—was one of his ancestors, and in 1903 received his degree from Harvard Law School. He delayed his entry into the legal profession to make a world tour. On his voyage he resisted the temptation of an offer extended him in Turkestan for a partnership in a vineyard, and in casual stages returned to New York. Mr. Chadbourne became one of the leading corporation lawyers in the city. He began practice in 1905. For many years he headed the firm of Chadbourne, Hunt, Jaeckel & Brown. But throughout a prominent career he maintained a habit of involvement in causes. For example, in 1933 Mr. Chadbourne argued against a city measure that would have imposed a license fee on laundries. Speaking as counsel for the Chinese Government, he succeeded in having the bill defeated. For this, China awarded him the Order of the Brilliant Jade. During World War I Mr. Chadbourne served in a chemical warfare unit. He entered as a lieutenant and emerged as a colonel. He received the Legion of Merit from France. A magazine article on Mr. Chadbourne published in 1937 said that he belonged to 23 clubs in New York. Paris, Washington. Boston and London. The same article gave Mr. Chadbourne's answer to a question on how he had time to do so much: “I never play bridge,” he was quoted as saying. He played an active role in many civic and charitable organizations. He served as president of the New York Park Association. He was president of the American Friends of Yugoslavia, Vice President of Bundles for Britain and President of the Soldiers and Sailors Club.