Illinois Salines
... that although Illinois was legally a free state, the Illinois Constitution of 1818 allowed the use of slave labor at the Illinois Salines?
... that although <a href="./Illinois" id="mwAU0" rel="mw:WikiLink" title="Illinois">Illinois</a> was legally a <a class="mw-redirect" href="./Free_state_(United_States)" id="mwAU4" rel="mw:WikiLink" title="Free state (United States)">free state</a>, the Illinois Constitution of 1818 allowed the use of <a href="./Slavery_in_the_United_States" id="mwAU8" rel="mw:WikiLink" title="Slavery in the United States">slave labor</a> at the <b id="mwAVA"><a href="./Illinois_Salines" id="mwAVE" rel="mw:WikiLink" title="Illinois Salines">Illinois Salines</a></b>?