 Complete the following phrase:  The origin of the name Tal-Ħalfa is a matter of conjecture. The word ħalfa means oath or vow in Maltese. A local legend links with the name of the islet with Dragut, a famous pirate warrior and Ottoman admiral, who swore to seek revenge for his brothers death on the island of Gozo. According to this legend, Draguts brother was killed in Gozo while raiding the island in 1544. The famous pirate asked for his brothers corpse for burial. The Gozitans refused to turn the body over, and burned it in front of Draguts eyes in a place now occupied by St. Johns demi-bastion. It is said that when the Turks boarded their galleys to leave Gozo, Dragut went up on a large rock nearby, now known as il-Ġebla tal-Ħalfa the Vow Rock, where he vowed to come back and wreak his vengeance on the people of Gozo. In 1551, Dragut laid siege to Mdina, but upon remembering his vow, 