Which expedition was the man who developed the Chinook dogsled breed part of?
Arthur Treadwell Walden: Arthur Treadwell Walden (May 10, 1871 – March 26, 1947) was a Klondike Gold Rush adventurer, dog driver and participant in the first Byrd Antarctic Expedition. Arthur Treadwell Walden:  He is also known as an author and developer of the Chinook sled dog breed.
i don't know