The graffito was discovered in the late 1980s by G.M.H. King, and will be published in her forthcoming collection of more than 2,000 Safaitic inscriptions. It was mentioned briefly by M.C.A. Macdonald, “Herodian Echoes in the Syrian Desert,” in S. Bourke and J.-P. Descoeudres (eds.), Trade, Contact and the Movement of Peoples in the Eastern Mediterranean: Studies in Honour of J.B. Hennessy (Sydney: Meditarch, 1995), p. 286. I thank both for sending me information at an early stage.