History of the Chinook Dog
BAE I:
  The Byrd Antarctic Expeditions
 Chinook Dog historical facts are taken from documents archived by The Ohio State University Archives and the Byrd Arctic Research Center:  https://library.osu.edu/find/collections/byrd-polar-archives/
Chinook fanciers have long discussed Walden's height in relation to determining the size of Chinook through photos.  The Ohio State University Archives have documents with a brief history and description of the men serving on BAE I including  Arthur Walden.  These facts on Walden are taken from one such document and should serve to answer any questions regarding Walden's height and the size of early Chinook dogs.
"WALDEN, ARTHUR TREADWELL, 57, 
In charge of dogs.  Wonalancet, New Hampshire."
"Height, 5 feet, 7 3/4 inches.  Weight, 150 pounds.  Blue eyes, gray hair, ruddy complexion.  Scars on right cheek and right thigh."
"Well known for his work with the dogs in the northern states and in Canada."
Chinook fanciers have also had long discussions regarding the size of Chinook and his offspring in relation to the desired size of today's Chinook dog.  The following is a list of the 16 male Chinook dogs who served on BAE I along with their weights, and is taken from documents from The Ohio State University Archives.  (The spellings of the names with added asterisk are hard to decipher and may be changed if new info is received.)

List of Chinooks who served
 on BAE I:  "Chinook Kennels"
Using this list of BAE I male Chinook dog weights to the left, the average weight for Walden's  male Chinook Dogs was 76 pounds and the range in weights of the dogs was  65 to 90 pounds, with Chinook being the heaviest dog - heavier than any of his sons.
"On Board S.S. Sir James Clarke Ross at Norfolk, Virginia. October 22, 1928.    94 dogs including eight bitches.   Those which had names were:" (Named on these lists are: Labrador   dogs, Labrador bitches, Alaskan dogs, and Dogs from Chinook Kennels.)
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Walden's dog Chinook
Arthur Walden, Admiral Byrd with Chinook, Brooklyn Naval Yard, NY, NY
Byrd Antarctic Expedition Photo
Chinook
Karluk
Kuskokwim
(owner Caryl Peabody)
Scaramouche
(owner Caryl Peabody)
Muskeg
(owner Caryl Peabody)
Ballaratt
Shagwa
Kewalik
Attui
Taruigau
Quimbo
Omiak
Kyack
Noatak
Chilkat
Unimak        

90 pounds
85
83

78

70

79
78
72
74
75
79
65
68
78
74
69