ABBAS I. (1813-1854), pasha of Egypt, was a son of Tusun Pasha and grandson of Mohammed Ali. As a young man he fought in Syria under Ibrahim Pasha (q.v.), his real or supposed uncle. The death of Ibrahim in Nov. 1848 made Abbas regent of Egypt, and in Aug. 1849 following, just before the death of Mohammed Ali, Abbas succeeded to the pashalik. He was a reactionary, cruel, morose and taciturn, and spent nearly all his time shut up in his palace. He undid, as far as lay in his power, the works of his grandfather, good and bad. Among other things he abolished trade monopolies, closed factories and schools, and reduced the strength of the army to 9,00o men. At the instance of the British Government he allowed the construction of a railway from Alex andria to Cairo. On July 13, 1854, he was murdered in Benha palace by two of his slaves.