Today we spent the first half if the day lowering the north-east corner of the trench about 30 cm. At this time we also discovered a dark circular feature which could be a post hole within the larger rocky elliptical feature at the bottom of the long central trench. Later we lowered one of the steps in the deep central trench and discovered 3 more dark circlar features. After photographing and documenting these features we began lowering the north-east corner again.