Pyrrhus The First
... that the first Derby Stakes to be officially timed took place in 1846, with Pyrrhus The First completing the mile-and-a-half (2.4 km) course in 2:55.0?
... that the first <a href="./Epsom_Derby" id="mwfw" rel="mw:WikiLink" title="Epsom Derby">Derby Stakes</a> to be officially timed took place in 1846, with <b id="mwgA"><a href="./Pyrrhus_The_First" id="mwgQ" rel="mw:WikiLink" title="Pyrrhus The First">Pyrrhus The First</a></b> completing the mile-and-a-half (2.4<span id="mwgg" typeof="mw:Entity"> </span>km) course in 2:55.0?