Carta de Pedro Francisco de Sousa para os Sobas “Cippriano, Quixona, Ngondo, Vullaquitombo, Cabinda, Chingo, Mahundo, Massaque, Quillemba, Buehia, Mucumbi, Mabanda, Pemba, Canga, Quibungo Dungue, Mulele huadengue, Pango-acahungo,Tenda e Benga-cahassa"
1892-02-17