Al Fadi and Dr Jay refute the first four claims : 1. Thomas the Presbyter (634AD), who refers to a battle between the Romans and a "Tayaye d-Mhmt" which happened east of Gaza in 634 AD.  2. A flyleaf (634 AD), this refers to a battle of Yarmuk between the Syrians and the Arab of Mhmud. 3. The Sophronius and Jerusalem (637 AD). A Christian account of the conquest of Jerusalem in 637 AD by the Caliph Umar. 4. The Pact of Umar(637 AD).