From a Gutenberg e-text of Louis Antoine Fauvelet de Bourrienne, Memoirs of Napoleon, Volume 03, ed. and trans. R.W. Phipps., 1891:
"While Bonaparte was thus actively taking measures for the organization of the country, General Desaix had marched into Upper Egypt in pursuit of Mourad Bey. We learned that Ibrahim, who, next to Mourad, was the most influential of the bays, had proceeded towards Syria, by the way of Belbeis and Salehye'h. The General-in-Chief immediately determined to march in person against that formidable enemy, and he left Cairo about fifteen days after he had entered it. It is unnecessary to describe the well- known engagement in which Bonaparte drove Ibrahim back upon El-Arish; besides, I do not enter minutely into the details of battles, my chief object being to record events which I personally witnessed.
At the battle of Salehye'h Bonaparte thought he had lost one of his 'aides de camp', Sulkowsky, to whom he was much attached, and who had been with us during the whole of the campaign of Italy. On the field of battle one object of regret cannot long engross the mind; yet, on his return to Cairo, Bonaparte frequently spoke to me of Sulkowsky in terms of unfeigned sorrow.
"I cannot," said he one day, "sufficiently admire the noble spirit and determined courage of poor Sulkowsky." He often said that Sulkowsky would have been a valuable aid to whoever might undertake the resuscitation of Poland. Fortunately that brave officer was not killed on that occasion, though seriously wounded. He was, however, killed shortly after."