Black people have lived in Ireland in small numbers since the mid-16th century. They include the rebel Mulatto Jack (fl. 1736), the singer Rachael Baptist (fl. 1750-1775), who were both Irish. Other such as Osmond Tisani (fl. 1905–1914) were born abroad but settled in Ireland. Mainly concentrated in the major cities and towns, especially the N7 Corridor, Limerick, Cork and Dublin, many in the 18th century were servants of wealthy families. Former slaves who visited or toured Ireland included Olaudah Equiano and Frederick Douglass.