This chapter tells the history of the German-born Uruguayan musicologist Francisco Curt Lange and the Latin-American Music Bulletin he created, a musicological project intended as a forum for musicians and music-related figures from all over Latin America, and the United States, interested in creating a regional field of musicological studies and musical promotion. It examines policies about disc collection, score printing and distribution, musical ethnographies, folklore, musical analysis, conferences, concerts, and regional institutions promoted by the Bulletin, and traces relevant aspects of Lange’s professional journey between Germany, Uruguay, Argentina, Brazil, and the United States, among other places. The chapter also highlights the changing place of the United States, both as a subject of musicological study and as a site of music-related hemispheric initiatives, in the history of this Latin Americanist project.