MARRIED. Martin Mayer, 52, author (The Lawyers, The Fate of the Dollar) and sometime music critic for Esquire and other publications; and Karin Lissakers, 36, a former deputy director of the policy planning staff of the State Department; he for the second time, she for the first; in Washington, D.C.

DIED. Harold McLinton, 33, linebacker forthe Washington Redskins from 1969 to 1979; of injuries received last month when he got out of his car on the shoulder of an interstate highway to ask directions of an acquaintance in another car and was struck by a passing motorist; in Washington, D.C.

DIED. Leon Janney, 63, child actor in such movies as Courage (1930), Abie's Irish Rose (1928) and several Our Gang comedies who went on to a busy career in radio, theater, film and television; of cancer; in Guadalajara, Mexico. Janney made his debut as a two-year-old vaudevillian in his home town of Ogden, Utah, portrayed the all-American boy Richard Parker in The Parker Family on both radio and television, and was also noted for roles like Mr. Peachum in the 1956 off-Broadway revival of The Threepenny Opera.

DIED. Richard R. McNulty, 81, retired vice admiral and sixth-generation sailor who helped to found the U.S. Merchant Marine Cadet Corps in 1938 and the U.S. Merchant Marine Academy at Kings Point, N.Y., in 1943, serving as the academy's superintendent from 1946 to 1948; in Gloucester, Mass.

DIED. John Van Vleck, 81, physicist regarded as the "father of modern magnetism"; in Cambridge, Mass. Van Vleck was the first to indicate the significance of "electron correlation," or the interaction between the motions of electrons; and his 1932 book, The Theory of Electric and Magnetic Susceptibilities, remains a classic in the field. His research, for which he was a co-recipient of the 1977 Nobel Prize for Physics, helped explain how a foreign atom invades the symmetrical structure of a crystal, and was basic to the development of modern computer memory systems.

DIED. Elizabeth Smith Friedman, 88, cryptographer and co-author of the 1957 book The Shakespearean Ciphers Examined, in which she and her husband William used modern statistical methods of linguistic analysis to dispute the theory that Sir Francis Bacon was the secret author of Shakespeare's plays; of arteriosclerosis; in Plainfield, N.J. Learning code-breaking during World War I at the U.S. Government's Riverbank Laboratories in Geneva, Ill., Friedman served as an expert witness in such trials as the so-called Doll Woman Case of 1944, in which an antique doll dealer in New York City was convicted of spying for Japan.

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