Room 103/107 was rectangular in shape (c. 2.6 × 3.5 m; Fig. 4) and surrounded by walls on all sides (W1–W3, W7; width 0.8–0.9 m). Walls 2 and 7 were preserved up to six courses high (0.8 m), whereas W1 and W3 survived only three courses high (0.45 m). The room was entered from the north through a doorway (width 0.85 m) set in the western third of W7. Stone doorjambs were preserved on both sides of the doorway. Two threshold stones bear an inner groove and a hewn base for the door hinge (Fig. 5). The floor of the room was c. 0.15 m lower than the door threshold and c. 0.2 m lower than the courtyard floor. A small, irregularly-shaped, rock-cut pit (diameter c. 0.4 m, depth 0.6 m) was at the southern end of the room.
Work Surface 4 (1.3 × 1.5 m; Fig. 6) was rectangular in shape and built along the outer face of W2.
Courtyard 117 (c. 4.7 × 5.5 m; Fig. 7) was rectangular in shape and surrounded by walls on the west, north and east (W5, W6, W8; width 0.5–0.8 m). Wall 5 was preserved to a height of five courses (0.7 m), whereas W6 and W8 survived to a height of only one or two courses (maximum height 0.3 m). Wall 5 adjoined the northwestern corner of the building (W2, W7; Fig. 8) from the west. The courtyard was entered from the south via an opening (width 1.1 m) situated between the southern end of W8 and the room’s northeastern corner; a stone socket was found in situ at the southern end of W8 (Fig. 9). A probe excavated in the southwestern corner of the courtyard (L118), beneath the floor, unearthed natural loess soil.
The walls of the room and courtyard were founded for the most part on bedrock. Signs of rock-cuttings and leveling of the bedrock were noted in several places. The bedrock outcrop beneath the corner of W1 and W3 was evenly hewn to serve as the bottom course of the walls (Fig. 10). The corners of the watchman’s hut were constructed of especially large stones. The walls’ exterior was built of large, roughly hewn stones, and their interior was made of small and medium fieldstones; the walls’ core was filled with small stones and earth. Walls 3, 6 and 8 were damaged by erosion, and their stones tumbled down into the streambed of Nahal Tilla; thus the outer face of W3 was destroyed and W8 was only partially preserved.
The floors of the room and the courtyard were made of well-tamped layers of loess, on which fragments of pottery vessels, stone vessels and several glass fragments were found. The pottery assemblage dates to the Late Byzantine period, and consists of bowls, including a Late Roman C vessel (Fig. 11:1), cooking pots (Fig. 11:2–6), bag-shaped jars (Fig. 11:7–10) and a flask (Fig. 11:11). The base of a basalt bowl was also discovered (Fig. 11:12).
The cave entrance, which was blocked with loess and stones, was exposed c. 9 m east of the watchman’s hut (L110; Fig. 12). The cave was natural and was only partially excavated.
The remains at the site were dated to the Late Byzantine period based on the pottery sherds. The structure was not built as a single unit; the room was constructed first and the courtyard was added later. The watchman’s hut was an isolated structure, not part of any settlement. It was located c. 2 km west of Khirbet Abu Khaff and it attests to the agricultural activity of the local inhabitants.