Columbus Cubes

This piece of fine origami was first published by David Mitchell in his book Mathematical Origami, the source of the instructions provided herein.
When making Columbus Cubes (the ones that stack on their corners), start by making the standard cube. When you've mastered that process, modify the relevant pieces to create the indented corner. You will always achieve the best results if you are very accurate with your folding.
Note that the Cube Template is 'double-sided'. With care, it can be printed on both sides of a single piece of A4 paper to provide two pre-marked (on both sides) squares.