<p><span class="deck"> <span class="typestyle"> The river that disappointed him bears his name, but Alexander Mackenzie’s great achievement in slogging to the Pacific is now almost forgotten.</span> </span></p>
<p><span class="deck"> The first men to follow Lewis and Clark across the continent to the Pacific were John Jacob Astor’s fur traders. They discovered the formidable chasm of Idaho’s Snake River—and almost never got out</span> </p>
