shelling the Ottoman fortresses in the late morning, and de Roebeck was given the order to begin his run into the narrows at 12:15. Cornwallis followed Vengeance at a distance of four cable lengths and the two ships made their initial pass into the straits before turning about to allow Guépratte room to manoeuvre. Neither ship was damaged in the attack and de Roebeck reported that several of the Ottoman batteries were no longer manned, so Guépratte began his run. His ships received only a single shot in return, so Carden ordered a group of minesweepers to enter the straits and begin clearing the naval mines. Cornwallis and most of the rest of the fleet were detached to return to Tenedos while a few ships remained behind to cover the minesweepers. After making preparations for another major assault on the Ottoman defences, the Anglo-French fleet launched another attack on 26 February. Several ships were tasked with sending raiding parties ashore to destroy the Ottoman guns directly, while Cornwallis and several other ships bombarded the fortresses from the Aegean Sea. The landing parties succeeded in destroying several guns at Kumkale, "Orkanie", and Sedd el Bahr, but the work was not completed by the end of the operation that day. De Roebeck intended to resume the attack the following day, but poor weather prevented him from doing so. For the next major attack on 2 March, Cornwallis was assigned to the 1st Division, and the fleet was tasked with attacking fortresses further up the straits, particularly the batteries at Dardanus and Erenköy. Cornwallis was given the mission to suppress the battery of six howitzers at Intepe before joining the attack on Erenköy. She quickly neutralised the guns at Intepe before turning to shell those at Erenköy, which were also quickly suppressed. Cornwallis then fired two shells at Dardanus before de Roebeck recalled his ships, as the Ottoman guns all appeared to have been destroyed. The British attempted another raid on 4 March; Cornwallis was stationed inside the strait to directly support a landing party of Royal Marines from the troopship . She shelled the fort at Kumkale while the marines went ashore; they landed unopposed, but quickly encountered stiff Ottoman resistance in the village near the fort. Cornwallis and the battleship attempted to break up the Ottoman defences, but the Ottoman fire proved to be too heavy, and the marines had to