Thoreau writes in his journal:
To-day examined the flowers of the Nemopanthes Canadensis,—a genus of a single species, says [Ralph Waldo] Emerson (Journal, 2:206).
Concord, Mass. Ralph Waldo Emerson writes to Ainsworth R. Spofford on 23 May:
I received day before yesterday your letter & its envelope of $5.00 for Mr. Thoreau. He begs me to thank you for your care of his interests, and said, that it was the first money he had received from his book.
(New England Quarterly, vol. 38, no. 1 (March 1965):73)