This is one of a series of images of the Golden Potlatch festivals held in Seattle from 1911 to 1913. This image is signed, unlike many other Golden Potlatch photos.
Note how "Parade" is spelled. Otto was writing captions backwards on the glass negatives, and sometimes missed letters or strokes within letters.
There are also several versions of Image 46 (46 - Washington Timber) showing forests and an Image X46 (X46 - Oregon Bldg. A.Y.P.E.) from the Alaska Yukon Pacific Exposition. Reuse of image numbers and different image series make it difficult to know how many images Otto published.