Skyrim: "Good Intentions" quest, find entrance to The Midden (Augur of Dunlain)

To find the entrance to the Midden which is under the College of Winterhold go stand outside by the statue infron of the main door that leads to the "Hall of Elements". From there go the Left side where you'll find a window...on the ground below where the window is you'll see a trap door. Use the trap door to gain entrance to "The Midden" so you can find the Augur of Dunlain

Quest is "Good Intentions"

-Report to Savos Aren
-Find the Augur of Dunlain
-Speak with Quaranir
-Follow Ancano
-Listen to Tolfdir