sentences:  The earliest progenitors of the urban styles of rumba (yambú and guaguancó) might have developed during the early 19th century in slave barracks ("barracones") long before the use of the term "rumba" as a genre became established.Such proto-rumba styles were probably instrumented with household items such as boxes and drawers instead of the congas, and frying pans, spoons and sticks instead of guaguas, palitos and claves.While these early precursors of rumba have been barely documented, the direct precursors towards the mid- and late-19th century have been widely studied.