Photograph of a horse looking over its stall door. The photograph may have been taken at the Multnomah County Fair in Gresham, Oregon.

Photograph of a horse looking over its stall door. The number 11 is written on the negative and is visible in the lower right corner of the image. The photograph may have been taken at the Multnomah County Fair in Gresham, Oregon.

Photograph of a horse looking out of its stall, possibly at the Multnomah County Fair in Gresham, Oregon.

Photograph of a riderless horse jumping over an obstacle on a course as a small crowd watches from a stadium in the background. The photograph may have been taken at the Multnomah County Fair in Gresham, Oregon.

Photograph of a riderless horse jumping over an obstacle on a course as a small crowd watches from a stadium in the background. The photograph may have been taken at the Multnomah County Fair in Gresham, Oregon.

Photograph of a horse wearing a bridle. The text “Alta Loma” and the number 6 are written on the negative and are faintly visible in the image. The photograph was likely taken at the annual Pacific International Livestock Exposition in Portland.

Photograph of a horse, taken from the side. An unidentified person outside the frame is holding the horse’s lead rope. The text “Chiquita” is written on the negative and is visible on the right side of the image. Also written on the negative is a mark that appears to be the numbers 3 and 4; one of the numbers was written later, over the original number. The photograph may have been taken at the annual Pacific International Livestock Exposition in Portland.

Photograph of a horse wearing a halter and lead rope. The rope is being held by an unidentified person outside the frame. The text “Golden Stirrup” and the number 12 are written on the negative and are visible in the image. The photograph was likely taken at the annual Pacific International Livestock Exposition in Portland. Image note: Photograph shows discoloration due to deterioration of the negative.

Photograph, taken from the side, of a horse wearing a halter and lead rope. The text “Humdinger” and the number 8 are written on the negative and are visible in the image. The photograph was likely taken at the annual Pacific International Livestock Exposition in Portland. Image note: Photograph shows discoloration due to deterioration of the negative.

Photograph, taken from the side, of a horse wearing a bridle. The text “Modernistic” and the number 3 are written on the negative and are visible in the image. The photograph was likely taken at the annual Pacific International Livestock Exposition in Portland.

Photograph of a horse wearing a bridle. The horse’s reins are being held by an unidentified person outside the frame. The text “Niel” and the number 5 are written on the negative and are visible in the image. The photograph was likely taken at the annual Pacific International Livestock Exposition in Portland.

Photograph, taken from the side, of a horse being held on a lead rope by an unidentified person outside the frame. The text “Panamint” and the number 9 are written on the negative and are visible on the right side of the image. The photograph was likely taken at the annual Pacific International Livestock Exposition in Portland.

Photograph of a horse wearing a bridle. The text “The Niece” and the number 4 are written on the negative and are visible in the image. The photograph was likely taken at the annual Pacific International Livestock Exposition in Portland.

Photograph, taken from the side, of a horse wearing a halter and lead rope. The text “Triumphant” and the number 10 are written on the negative and are visible on the left side of the image. The photograph was likely taken at the annual Pacific International Livestock Exposition in Portland. Image note: Photograph shows discoloration due to deterioration of the negative.

Photograph, taken from the stands, of horses and groups of observers in an arena. The photograph may have been taken at the annual Pacific International Livestock Exposition in Portland.

Photograph of a horse in a stall, looking over the chain barring the door. The number 12 is written on the negative and is visible in the lower right corner of the image. The photograph may have been taken at the Multnomah County Fair in Gresham, Oregon.

Photograph of a horse wearing a bridle and lead rope held by an unidentified person outside the frame. A barn is visible in the background. The number 9 is written on the negative and is visible in the lower right corner of the image. The photograph may have been taken at the Multnomah County Fair in Gresham, Oregon.

Photograph of a horse wearing a halter and lead rope held by an unidentified person outside the frame. The number 3 is written on the negative and is visible in the lower right corner of the image. The photograph may have been taken at the Multnomah County Fair in Gresham, Oregon.

Photograph of a horse wearing a halter and lead rope. The photograph may have been taken at the Multnomah County Fair in Gresham, Oregon.

Photograph of a horse standing on a dirt path with an unidentified man who is holding the horse’s lead rope. A building is visible in the background. The text “Evans” is written on the negative and is faintly visible on the lower left side of the image. The photograph may have been taken at the annual Pacific International Livestock Exposition in Portland.

Photograph of a horse with a braided mane and its tail in a bun. Buildings and parked cars are visible in the background. The photograph may have been taken at the annual Pacific International Livestock Exposition in Portland.

Photograph, taken from the side, of a horse wearing a bridle. Text that may be “Suny Bank” is written on the negative; the handwriting is unclear. The writing is faintly visible in the lower right corner of the image. The photograph may have been taken at the annual Pacific International Livestock Exposition in Portland.

Photograph, taken from the side, of a horse wearing a bridle. An unidentified person outside the frame is holding the horse’s reins. Text that may be “Dunhalime” is written on the negative; the handwriting is unclear. The writing is faintly visible in the lower right corner of the image. The photograph may have been taken at the annual Pacific International Livestock Exposition in Portland.

Portrait, taken from the side, of a horse facing to the left. The photograph was probably taken at the annual Pacific International Livestock Exposition in Portland. Image note: Photograph shows discoloration due to deterioration of the negative.

Portrait, taken from the side, of a horse facing to the left. The photograph was probably taken at the annual Pacific International Livestock Exposition in Portland. Image note: Photograph shows discoloration due to deterioration of the negative.

Photograph of a horse wearing a halter and a lead rope. The photograph was likely taken at the annual Pacific International Livestock Exposition in Portland.

Photograph, taken from the side, of a horse wearing a bridle The horse is standing on a wooden walkway next to a building. The number 5 is written on the negative and is faintly visible in the upper right corner of the image. The photograph was likely taken at the annual Pacific International Livestock Exposition in Portland.

Photograph, taken from the side, of a horse wearing a halter and lead rope. The photograph was likely taken at the annual Pacific International Livestock Exposition in Portland.