The ground on which the army now took up its position was a strong one. The right was on high ground, and extended to the ruins of a Roman palace within fifty yards of the sea. The left was on the canal that supplied Alexandria with water; here two batteries were ordered to be constructed, the lake protected its rear from attack. The distance from the sea to the lake was about a mile, and the position occupied was high and commanding. In front of this line was a plain on which cavalry could act, and beyond this was the French position, a high and steep ridge, extending from the sea to the canal. The army laboured unceasingly at the work of constructing batteries, and bringing up guns and provisions. Water was fortunately found in abundance, and the nights being cold, tents were landed and set up. The castle of Aboukir had been left unattacked as the army moved forward, but was now besieged and surrendered on the eighteenth.