How To Do It

The first thing to do is unscrew the valve and roll up the bottom to squeeze out all the air inside it. Then, it's relatively easy to stuff the thing into the hole in the wall. Make sure you've driven the picture hooks into the wall deeply enough so as to be able to hang the concealing portrait securely over that hole. Next, you must paint the wall a lighter color than the adjacent walls, and move a chair or credenza under the portrait.

 

Taking a moment to rest on the floor, you can then start work on the medallion. Remove the retaining bolts which hold it to the ceiling and save them in a teacup. Carefully wrap the plaster medallion with wool blankets as you remove it from the ceiling. A quick dusting with diatomaceous earth will keep the fleas from propagating. Reach into the cavity and locate the gas cap. Twist the cap counter clockwise two turns. You are now ready to replace the medallion by reversing the previous steps.

The rugs on the floor are next. They often conceal the fact that the floor has not been varnished in the center of the room - 19th century floor technology was expensive. Roll back the northwestern corners of the rugs (the least affected by sunlight in the Northern Hemisphere). Seek floorboards that were obvious replacements. Often these boards are loose and can be easily pried up. Remove the boards carefully and strew pebbles beneath them before replacing them.

Remember: you cannot be too careful or proceed too slowly with renovations. Be sure to map out enough time for this process!