[…] a pistol on the cushion beside him. (5)
No warlord's outfit would be complete without the essential accessory: a pistol. The colonel is ready to shoot and kill at the drop of a hat. The image of the gun on the pillow shows how he may be gracious, but he's packing a fatal force behind it all.
The moon swung bare on its black cord over the house. (6)
Don't forget: they have the power, and you don't. An image of violent interrogation, of torture, stands above the house to suggest the kinds of work this man does.
[…] a gold bell was on the table for calling the maid. (11)
If the colonel says jump, the answer should be, "How high?" The colonel and his family have a servant at their beck and call. Notice the bell is gold to indicate the power of wealth to dominate others.