Calabar River
... that the Calabar River was a major conduit of supply for the Atlantic slave trade?
... that the <b id="mwBq4"><a href="./Calabar_River" id="mwBq8" rel="mw:WikiLink" title="Calabar River">Calabar River</a></b> was a major conduit of supply for the <a href="./Atlantic_slave_trade" id="mwBrA" rel="mw:WikiLink" title="Atlantic slave trade">Atlantic slave trade</a>?