The bottom level of this tower has a locked novice gate. Inside, there is a table with a leveled helmet, and a novice or apprentice locked chest to the right down the stairs amongst the rubble. The second floor houses a hagraven. The skill book, Sithis is opposite the door next to the linen wrap and troll skull.
On the third level, there is a pressure plate on the landing at the top of the stairs that triggers a soul gem (lightning). At the top of the tower is a bird's nest.