Rosetta Stone found, but later Egyptologists, including Wallis Budge, used these other copies to refine the reconstruction of the hieroglyphs that must have been used in the lost portions of the hieroglyphic text on the Rosetta Stone. Napoleon's 1798 campaign in Egypt came at (and helped cause) the beginning of a burst of Egyptomania in Europe, and especially France. A corps of 167 technical experts ("savants"), known as the "Commission des Sciences et des Arts", accompanied the French expeditionary army to Egypt. On 1799, French soldiers under the command of Colonel d'Hautpoul were strengthening the defences of Fort Julien, a couple of
Rosetta Stone (software) 3.0 or 4.0.x. The Rosetta Stone v2.1 through v2.2.x are only compatible with v6.x language courses. These versions of the language packs and software engine are neither backward compatible nor forward compatible. Language discs developed for The Rosetta Stone v2.0.x are incompatible with these later revisions of the software. In v2.1.4.1A of The Rosetta Stone, the program began using copy protection software called SafeDisc. Rosetta Stone Version 3 is not backward compatible with language packs developed for Rosetta Stone Versions 1 or 2. Version 3 was initially released in August 2007 for ten bestselling languages, with other languages following later