Jan Wong was one of Canada's ace reporters. She won readers and admirers for the Globe and Mail. Then suddenly, a couple of years ago, she vanished from the pages of her paper. Why? Because she suffered from depression, and management refused to acknowledge the fact; they thought she was just being lazy. One has some sympathy with the Globe's misunderstanding, but it's come at the cost of the thinning of the ranks of honest frontline journalism.