October 1954 (age 55)

Nothing to report.

October 1969 (age 70)

The Hidden Forest makes its debut. Sigurd had promised his friend and nature photographer Les Blacklock several years earlier that he would write the text for a coffee table book showcasing Blacklock's photos if Blacklock found a publisher. The fact that the book was published by Viking caused some embarassment for Sigurd's agent, Marie Rodell, who knew nothing about it, and some consternation for Alfred Knopf, who not only was Sigurd's friend but had right of first refusal on Sigurd's books. But Sigurd considered it a photography book with his words as complementary, and apparently hadn't even considered that it might upset Rodell and Knopf. He was quite apologetic afterward, and Rodell and Knopf forgave him. Meanwhile, the book got good reviews, and Sigurd even got a letter at the end of the month from television legend Arthur Godfrey, who wrote: "You and Les Blacklock are to be congratulated on turning out one of the most beautiful volumes I have ever seen. It will give me many, many hours of pleasure."