Possible Clues:

• Does the catalogue need to have got sound?
• Heard with intention
• Took notice, got drunk, enlisted
• Paid attention and fibbed about a machine gun
• Paid aural attention, having enlisted
• Made up stories about a gun that obeyed spoken commands?
• Does the catalogue need to have got this, by the sound of it?
• Got, by the sound of it, that the inclination need be twisted
• By the sound of it, one got this
• Gave an ear, but not as van Gogh did