(Comic) strip search proves fruitful

I wonder how extensively Kevin Costner researched that epic cinematic masterpiece that established him as an auteur? No, not that post-apocalyptic romp we all ignored that is starting to come true, Waterworld, the other one.

I found an old paperback compendium of the  Tumbleweeds comic strips – the work of T. K. Ryan (who only retired a couple of years ago, it turns out). One of the strips is clearly Dances with Wolves: