Among the eminent Jewish musicians who frequently visit the United States are the pianist, Joseph Gabrilowitsch, a native of Russia, who married the only surviving daughter of the great American humorist, Samuel L. Clemens (1835–1910, better known as “Mark Twain”), Joseph Hoffman, and Mischa Ellman, the violinist, likewise a native of Russia. In the operatic and theatrical world Jews are predominant as managers and impressarios. The best known among them are David Belasco (b. in San Francisco, Cal., 1859), who is also a dramatic author; Abraham Lincoln Erlanger (b. in Buffalo, N. Y., 1860), whose brother, Mitchell Louis, was elected a justice of the Supreme Court of New York County in 1906; Daniel Frohman (b. in Sandusky, O., 1853), and his brother, Charles (b. there 1860). Charles Klein (b. in London, Eng., 1867) is a well-known playwright, two of whose most successful plays, “The Auctioneer” and “The Music Master,” were especially written for David Warfield (b. in San Francisco, 1866), also a Jew, who is in the front rank of the theatrical profession in this country. These plays were produced under the management of David Belasco, and it presents only one of many such instances on the American stage in which the author, the actor or actress playing the leading part and the manager, or impressario, are all Jews. Oscar Hammerstein (b. in Berlin, 1847; a. 1863) is an inventor, playwright, builder and manager of theatres and opera houses, who has rendered valuable service in the development of operatic productions in the United States. Sydney Rosenfeld (b. in Richmond, Va., 1855) is the author of dramas, operettas and musical plays which have found much favor with the public.