The Brown University Library Center for Digital Initiatives has crafted well over a dozen excellent collections for use by the general public. This fine addition brings together Yiddish language sheet music from the John Hay Library. Most of the materials here came from the collection of Menache Vaxer, a Yiddish writer. The collection was acquired by the library in 1968, and it included over 850 pieces of piano-vocal or instrumental music, dating from the 1890s to the 1940s. Visitors can browse 327 pieces of sheet music by creator or title, and they will have access to the complete scores. There are some fascinating numbers here, including "Mameniu: Or the Triangle Victims" and "Beware of the Devil's Power."