Final answer:
James Cross had no direct involvement in the discovery or decipherment of the Rosetta Stone. The decipherment was done by Thomas Young and Jean-François Champollion.
Step-by-step explanation:
James Cross had no direct involvement in the discovery or decipherment of the Rosetta Stone. The stone was discovered by soldiers in Napoleon's army in 1799, and it was Thomas Young, an English physicist, who first showed that some of the hieroglyphs on the stone wrote the sounds of a royal name, Ptolemy. The French scholar Jean-François Champollion then deciphered the hieroglyphs and laid the foundations of our knowledge of ancient Egyptian language and culture.
Learn more about James Cross and the Rosetta Stone