As no attempt had been made to return the fire by the artillery, Sir Sidney Smith was convinced the French must be unprovided with a siege train. Having learned from people who had escaped by boat from Jaffa, that only field-pieces had there been employed to batter the wall, he ordered a constant watch to be kept for any ships seen approaching, as Bonaparte would hardly have hoped to take so strong a place as Acre without heavy guns, and had doubtless arranged for a battering-train to be sent from Alexandria by sea. This would probably be ordered to make either for Jaffa, or for Caiffa, a small port a few miles south of Acre. The _Theseus_ was at once sent down to Jaffa, to prevent any landing of guns or stores being effected there, while the _Tigre's_ boats were placed at intervals between Caiffa and Acre.