There was a note in the room before there, stating in part 'in a row like water flow'. This is referring to the heights of the levers...
<span class='standouttext'>Spoiler : </span><span class='spoiler'>Pulling the levers from highest to lowest opens a secret cellar with some loot, and you do not have to fight any gargoyles or the earth elemental.</span> (highlight the text to read)
If you have pulled all of the levers (in the 'correct' order or not), a set of stairs should be revealed behind the statue.
