Sao civilisation
...that the Sao civilisation is the earliest to have left clear traces of their presence in the territory of modern Cameroon?
...that the <b id="mwBwI"><a href="./Sao_civilisation" id="mwBwM" rel="mw:WikiLink" title="Sao civilisation">Sao civilisation</a></b> is the earliest to have left clear traces of their presence in the territory of modern <a href="./Cameroon" id="mwBwQ" rel="mw:WikiLink" title="Cameroon">Cameroon</a>?