His huge sarcophagus, carved in one piece and intricately decorated on every surface (including the goddess Nut on the interior base), is in Sir John Soane's Museum, Soane bought it for exhibition in his open collection in 1824, when the British Museum refused to pay the £2,000 demanded. On its arrival at the museum, the alabaster was pure white and inlaid with blue copper sulphate. Years of the London climate and pollution have darkened the alabaster to a buff colour and absorbed moisture has caused the hygroscopic inlay material to fall out and disappear completely. A small watercolour nearby records the appearance, as it was.