Quote Originally Posted by Lee L View Post
First google result for: hand in coat pose
http://www.napoleon-series.org/faq/c_hand.html
According this source, "In real life," Miller observes, "the 'hand-held-in' was a common stance for men of breeding."

Sort of like how current "men of breeding" (or those wishing to appear so) walk around with the collars of their polo shirts turned up or with sweaters draped over their shoulders.