Further mining and quarrying expeditions may be inferred from indirect evidence. An inscription of Sahure in the Wadi Abu Geridah in the Eastern desert as well as other Old Kingdom inscriptions there suggest that iron ore was mined in the vicinity since the times of the Fourth Dynasty. The lower half of a statue with the name of the king was discovered in 2015 in Elkab, a location possibly connected with expeditions to the Eastern desert and south of Egypt to Nubia. Sahure's cartouche has been found in graffiti in Tumas and on seal impressions from Buhen at the second cataract of the Nile in Lower Nubia.