These images illustrate different aspects of mushing in Alaska.
A set includes one each of the following:
31. Malemute Chorus
39. Keystone Canyon
64. Mush You Bear!
75. Seppala's Famous Dog Team at Fairbanks, Alaska
149. S.P.R.Y. Nome Alaska 1914
231. Mail team break time
Each set contains six notecards which are blank inside and six envelopes, all in a lovely white box with a clear cover.