This section is from the book "Box Furniture", by Louise Brigham. Also available from Amazon: Box Furniture.

Body. 1 Condensed-milk Box (about 7 1/4 in. deep, 13 in. wide, 19 3/4 in. long).
Hardware. 2 picture hooks and picture wire.
Remove the cover carefully and put aside for future use.
If possible, withdraw all the nails from the ends of the box without marring the sides. Otherwise, take the box apart by first removing the bottom, then the sides.
If any portions are rough or bear objectionable brands or blemishes, either plane or sandpaper them smooth while the parts are separated and the nails removed.
Draw a pencil line across the best face of each of the sides 4 inches from each end. Set the ends in, keeping the outside face of the ends exactly to the line, and nail each side to the ends, using care to keep all the edges even with each other. Draw a line across the best face of the bottom 4 inches from each end, and then put the bottom on, driving the nails in just far enough to tack it at first, as the bracket must be square. Lay the bracket on its side on the floor. Square it by holding the square inside while the back is securely nailed in place. Stain or paint as desired.
The bracket may be hung with wire from molding or fastened to the wall by two screws.
 
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