I got to the beautiful Lake O'Hara lying in a rainbow sleep, under the steeps of Mount Lefroy and the waterfalls of Oesa. And there I realized some of the blessedness of mortals. -- J.E.H. MacDonald in A Glimpse of the West, 1924 In the autumn of 1924, the Canadian landscape artist James Edward Hervey (J.E.H.) MacDonald went on a painting holiday. His destination was the tiny region of Lake O'Hara in Yoho National Park, British...