"Some came for sheer love of adventure and wanted no reward beyond that; some wanted fame or its counterfeit, publicity; some were mercenary and thought primarily in terms of what they were going to get out of it; and lastly there was that small group, the like of which gives character to any expedition of merit — not necessarily scientists at all, but men who could understand the lure, if not the love, of knowledge for its own sake; men who came not for position or money but who found full reward for their effort in the pursuit of an ideal."