Now the feet.
The perspective lines of the stage on which the model was posed are, and should always be, drawn, as well as the block on which the left heel is raised. These are rigid lines, and will indicate for you the relative positions of the feet. Wherever such lines or similar features occur on the ground or the background, make them an essential part of your drawing, and it will help you to get the feet planted.
It will be of some assistance to you while constructing your figure, and particularly in going
over the ground a second time, to indicate all decided shadows, marked half-tones, and internal drawing, the better to judge your proportion and prove the correctness of your outline.