The Theban Magical Library

No excavation lies behind it: ten papyri are linked by dealers' word, Anastasi's sales and shared hands. In 2016 Korshi Dosoo argued they need not have had one owner.

Elien Zoete, 'Theban Magical Library', Trismegistos Archives, ArchID 363 (2018), summarising Korshi Dosoo, 'A History of the Theban Magical Library', BASP 53 (2016) 251-274

Greek and Demotic magical papyri of the 3rd–4th century AD from Thebes, sold by Giovanni Anastasi.

Sources2 sources

Primary source

F. Ll. Griffith and Herbert Thompson (eds and trans.), The Demotic Magical Papyrus of London and Leiden, vol. 1, 1904, col. XVIII, lines 16-20 (p. 121); introduction, p. 1That the practitioner of the vessel-inquiry speaks as Horus and asks Anubis to bring in the gods to answer truly; and that the papyrus was found at Thebes and bought by Anastasi.
bring the light in unto me to my vessel-inquiry, for I am Horus, son of Osiris, born of Isis

Scholarship

Elien Zoete, Theban Magical Library, Trismegistos Archives ArchID 363, version 1, 2018, pp. 1-5That ten papyri are generally accepted as the library, grouped by Anastasi provenance, Theban origin and shared hands, with no known archaeological context, and that Dosoo (2016) doubts a single owner.
there is no reason to think there was only one magical specialist in Thebes