A few years later the NPG put up the Friends of Photography restrospective which included a 16x20 enlargement of that negative (printed by A. Adams, of course). Horrible. That soured me on Adams forever. Every time I see any enlargement by Ansel Adams I like them less and less.
If you ever get a chance to see his contact prints, which is how he did almost everything before 1940, don't pass it up. They're some of the most beautiful photographs ever made.