Hi Wendelin!
This is without doubt great work you have done.
Weather you have coloured a photo or painted it from scratch using the photo by Edward Curtis or not, doesnt matter, when it comes to how well executed you have done this work.
It would be interesting to know HOW you did this. Meaning, did you bring this photo into photo-paint, and afterwards colour it, from the original black. Or did you bring into photo-paint and then painted it from scratch.
Well done either way. Very good work
Wendelin sounds swedish. If so: "Hej!"