In 1949 van Berchem undertook a second trip to Algeria and another year later a first reconnaissance mission to Sedrata. It was followed by two systematic archaeological expeditions: in the course of the first one, which took place from the end of 1950 to the beginning of 1951, she had the means of aerial archaeology used to examine the extent of the site with its streets and channels. A hydro-survey was conducted as well. Limited excavations discovered a large building that was decorated with columns and arches. The second campaign, which took place from late 1951 to early 1952 discovered a residential complex with finely decorated stucco panels. Some fifty boxes of finds were sent to Algiers. However, van Berchem had to give up the project altogether after the beginning of the Algerian Revolution in 1954. A large part of her findings was only published posthumously in 2017.