That's Jerry's buddy!
Although the two may not be tuned to the same key, Sillett does realize Beranek's ability enough to have one or two of his books in the personal library.
About the article, one of my customers called like 7am in morning right after it was mailed, to let me know it was out and available.
Seems these articles, no matter how good, just never seem long enough.
So wait, I cant climb a big redwood, but Sillett can?
Is tree climbing illegal in parks in California?
Once you learn the basics about what is available, the question would be rephrased in the future.
You and Sillett have equal opportunity to climb redwoods.
It's not that Sillett "can" but rather than Sillett is permitted. So if you fill out the same permit application, they can authorize and give you the same permission to do it. Just let them know your credentials, what you plan to accomplish, and what your resources are.
Also, it's not available to anybody, short of an emergency, to climb in the big coast redwood parks during certain time of year. Like Humboldt Redwoods State Park for example.