Probable self-portrait of photographer O. M. Perrigo posing with his horse-drawn photography wagon with darkroom attached to the back. The subject appears to be holding a string which would have been attached to the camera lens cover, allowing him to take a self-portrait. Perrigo seems to have taken this stereoview photograph (cropped and edited for clarity) after taking more than two dozen stereoviews of buildings, machinery and employees at the Excelsior Straw Works in Medfield, Massachusetts, sometime during the late 1860s.