Harry hushed him and peered nervously about at the other elves, but none of them were listening, "Yes Dobby, we’re luring him here to defeat him, do you understand? Us, Professor Snape and Professor Dumbledore are making a plan," though Dumbledore wasn’t technically involved at all yet, Harry was sure that including his name would only make the elf more enthusiastic to lend a hand, "but we need someone to alert Draco and I when he’s on the castle grounds - can you do that for us?"