Final answer:
The decipherment of the cuneiform script was a significant linguistic/literacy mystery solved by scholars Henry Rawlinson, Edward Hincks, and Jules Oppert, leading to a deeper understanding of ancient Mesopotamian languages and cultures.
Step-by-step explanation:
The linguistic/literacy mystery that was solved as a result of the work of Henry Rawlinson, Edward Hincks, and Jules Oppert was the decipherment of cuneiform script. Cuneiform, used in ancient Mesopotamia, was one of the world's earliest systems of writing. The breakthrough came with the translation of the Behistun Inscription, which had texts written in three different cuneiform languages. This was a critical key in understanding ancient languages and scripts, specifically those of the Assyrian and Babylonian Empires.
The work of these scholars was significant in linguistics and historical literacy, paving the way for further understanding of ancient cultures and languages. Their collaborative efforts exemplify the interdisciplinary approach that is often necessary to solve complex historical puzzles. Additionally, the process of deciphering cuneiform highlights the importance of epigraphic and philological skills in historical investigation.