Hi gang. I wanted to share a find that is pretty cool and historical. I found a large color photograph of Chief Robert Yellowtail. It is signed twice. Once signed on photo and then signed with dedication on Mat. I cannot find any other autographs from him except one that is on a government site where signatures match. I don’t know value of this, just that it is cool and historical. Any ideas of value? And just thoughts on this piece. Thank you in advance.