||the drain is done by two courses of medium size stones; is ca. 260 cm long and curved slightly to South-West. The outer part is 160 cm long and is built by two courses of stones. The inner part, more towards the wall f12, is 100 cm long and is built by three courses, two lower, with medium size stones and one made by smaller pebbles, which are placed on the top of the bigger ones and extended more horizontally. The depth of the drain, till the end of the stones, varies between 45 and 60 cm (two and three corses). The drain bounds with the foundation of the wall f12. Where the drain comes out from f12, at the bottom, there is a large stone.
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