A while back, in requesting help identifying the subject of a photograph I had posted on my blog, I had received a number of suggestions from people knowledgeable about uniforms and photography styles. The original blog post is here: http://afamilytapestry.blogspot.com/2011/09/man-in-uniform.htmlhttp://afamilytapestry.blogspot.com/2011/09/man-in-uniform.html
Just the other day, a reader left a comment, identifying the subject as US Admiral George Dewey, from the era of the Spanish-American War. In double checking this suggestion via Google Images, it turned out there were several online sources for that exact photo.
I'm not sure why my copy's imprint showed the photographer as Jarmuth of Chicago. I don't know much about the history of uses of cabinet cards, although I do know they were used to distribute pictures of famous people as well as for family likenesses. Around 1899, Admiral Dewey was probably at the height of his career and considered a war hero, so it is not surprising to see his photo distributed widely.
And here, all along, I was thinking it was the photo of a relative!