Is this maybe him?
Dwight Gwaltney of B Company, 126th Engineers, 10th Mountain Division. Dwight Gwaltney told the story about digging a demolition hole and having Colonel William Darby (Famous for Darby's Rangers), who was then the Executive Officer of the 10th Mountain Division, order him to dig the holes faster. Col. Darby turned away and walked about 100 yards and was then killed by an artillery shell.
www.tenthmountain.org/dolephotos.htm