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

Body. 1 Candle Box (about 7 in. deep, 12 in. square).
Legs. 4 Strips 3/8 in. thick, 11/4 in. wide, 9 in. longer than the outside depth of the box. 4 Strips 3/8 in. thick, 1 1/2in. wide, 9 in. longer than the outside depth of the box.
Cleats. 2 Strips 1/2 in. thick, 1 1/2 in. wide, and length equal to the outside width of the box.
Make the legs 9 inches longer than the outside depth of the box. Remove the cover carefully. Nail a cleat across each end on the side presenting the worst appearance, keeping the edge of the cleat even with the end of the cover. Turn the box on its side and nail on the legs, keeping their upper ends even with the top of the box. The cover (with the cleats across the ends to keep it flat) is to be the shelf. Turn the stand upside down and set the shelf in place between the legs, keeping it 4 inches from the bottom of the legs, and nail through each face of leg into its edges. The stand will be complete, ready for staining or painting, as desired.
 
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