Small rectilinear corner fragment. Two dressed faces forming right angle. Same object as 16-4-112.3 and 19-12-28. Same unusual material surface is dark green gray color often with a crackled texture. All incised marks are very finely executed and very crisp.
From Nubia (Sudan) Gebel Barkal, B502 Ex 2 debris. 1919: excavated by the Harvard University-Museum of Fine Arts Expedition; assigned to the MFA by the government of Sudan.
Harvard University—Boston Museum of Fine Arts Expedition