Egypt did not know "the press" except through the newspapers issued by the French campaign, and it was natural for "Bonaparte" to think of issuing a newspaper for members of his armies in Egypt, through which they could receive news from France when they were far away, just as they used to know it when they were close, during what Bonaparte himself had previously ordered to be created for them while they were fighting with him in Italy..
It was also natural for Bonaparte - who had brought a number of scholars and researchers to Egypt - to think of issuing a bulletin containing the minutes of the sessions held by these scholars, and the results of the discoveries made by these researchers, and to send them to France, declaring his scientific victory alongside his military victories.