Coulter's Treason covers the "Have you no shame" episode as well. It's my understanding that Evans provided Coulter with his research to help her with her book.
According to Coulter, Welch, after putting on his whining, wimpering act for the press corps while attacking McCarthy, stormed out of the hearing. Once outside earshot of anyone but an aide, he asked; "Well,how did I do?"
Keep up the good work.