Answer:
Through Akerblad’s actions, Giblin shows him as someone whose confidence eventually stood in the way of his success.
Step-by-step explanation:
James Cross Giblin's work The Riddle of the Rosetta Stone is a historical work on the deciphered work of the Rosetta Stone that was discovered in Memphis. This historical stone laid the foundation for the understanding of the Egyptian language and scripts.
The given passage talks about Johan Akerblad, a Swedish student studying under Silvestre de Sacy. The passage details how his previous successes led him to make a mistake while deciphering the Stone. Through his actions, Giblin presents him as someone whose confidence in always succeeding led him to be adamant, thus obstructing him in the way of successfully deciphering the hieroglyphic. He made a mistake in claiming that the demotic hieroglyphic is alphabetic, leading to "no further progress in deciphering the demotic passage on the Stone".