Harry also owns half of a pair of two-way mirrors, given by his godfather Sirius Black, as a means of maintaining covert communications. In Book 7, "Harry Potter and the Deathly Hallows", when Harry and several friends are captured at Malfoy Manor, which Lord Voldemort was using as his headquarters, Harry uses the mirror to communicate with Aberforth Dumbledore, who sends rescue in the form of Dobby the House Elf.