Like the other mountain engines, Ernest is equipped with a face at each end.
"'Later, Culdee met two old friends. Ernest, number two, and Wilfred, number three. After some happy gossip, Culdee asked. "Who is Lord Harry?" "He's one of the new engines," they said, "who came while you were away; he's number six. Alaric and Eric are seven and eight, they're nice quiet engines, but old Harry's a terror!"
— Ernest and Wilfred talking about the new engines, Danger Points, Mountain Engines