Ebor
... that the upset victory of Ebor in the 1817 St Leger Stakes was ascribed to the overconfidence of Blacklock's jockey?
... that the upset victory of <b id="mwBMU"><a href="./Ebor_(horse)" id="mwBMY" rel="mw:WikiLink" title="Ebor (horse)">Ebor</a></b> in the 1817 <a href="./St_Leger_Stakes" id="mwBMc" rel="mw:WikiLink" title="St Leger Stakes">St Leger Stakes</a> was ascribed to the overconfidence of <a href="./Blacklock_(horse)" id="mwBMg" rel="mw:WikiLink" title="Blacklock (horse)">Blacklock</a>'s jockey?