The object of this is to teach the free movement of the limbs,
preserving at the same time perfect squareness of the shoulders, with
the utmost steadiness of body; and no labour is spared to attain
this first and most essential object, which forms, indeed, the very
foundation of good walking. The instructor must be careful that a habit
be not contracted of drooping or throwing back a shoulder at these
motions, which are intended practically to show the true principles of
walking, and that steadiness of body is compatible with perfect freedom
in the limbs.