Proto-Sinaitic (also referred to as Sinaitic, Proto-Canaanite when found in Canaan, the North Semitic alphabet, or Early Alphabetic) is considered the earliest trace of alphabetic writing and the common ancestor of both the Ancient South Arabian script and the Phoenician alphabet, which led to many modern alphabets including the Greek alphabet. According to common theory, Canaanites or Hyksos who spoke a Semitic language repurposed Egyptian hieroglyphs to construct a different script. The script is attested in a small corpus of inscriptions found at Serabit el-Khadim in the Sinai Peninsula, Egypt, dating to the Middle Bronze Age (2100–1500 BC). The earliest Proto-Sinaitic inscriptions are mostly dated to between the mid-19th (early date) and the mid-16th (late date) century BC. However, the discovery of the Wadi el-Hol inscriptions near the Nile River indicates that the script originated in Egypt. The evolution of Proto-Sinaitic and the various Proto-Canaanite scripts during the Bronze Age is based on rather scant epigraphic evidence; it is only with the Bronze Age collapse and the rise of new Semitic kingdoms in the Levant that Proto-Canaanite is clearly attested (Byblos inscriptions 10th–8th century BC, Khirbet Qeiyafa inscription c. 10th century BC). The Proto-Sinaitic inscriptions were discovered in the winter of 1904–1905 in Sinai by Hilda and Flinders Petrie. To this may be added a number of short Proto-Canaanite inscriptions found in Canaan and dated to between the 17th and 15th centuries BC, and more recently, the discovery in 1999 of the Wadi el-Hol inscriptions, found in Middle Egypt by John and Deborah Darnell. The Wadi el-Hol inscriptions strongly suggest a date of development of Proto-Sinaitic writing from the mid-19th to 18th centuries BC. Discovery In the winter of 1905, Sir William Matthew Flinders Petrie and his wife Hilda Petrie (née Urlin) were conducting a series of archaeological excavations in the Sinai Peninsula. During a dig at Serabit el-Khadim, an extremely lucrative turquoise mine used between the Twelfth and Thirteenth Dynasty and again between the Eighteenth and mid-Twentieth Dynasty, Petrie discovered a series of inscriptions at the site's massive invocative temple to Hathor, as well as some fragmentary inscriptions in the mines themselves. Petrie immediately recognized hieroglyphic characters in the inscriptions, but upon closer inspection realized the script was wholly alphabetic and not the combination of logograms and syllabics as in Egyptian script proper. He thus assumed that the script showed a script that the turquoise miners had devised themselves,