"What I wanted was not shelter and safety, but liberty and opportunity." At the age of 32, the unconventional spirit expressed in that statement took Martha to gold-rush-era Yukon while her first husband went off to Hawaii. Pregnant, and exhausted, she struggled over the legendary Chilkoot Pass, she fell in love with northern Canada, "this great big land" with its profusion of wildflowers, its midnight sun, its northern lights. Facing down despair...