Western exploration with Indian guide and the legend of the white buffalo

[Babette]

Read this book in 1955, checked out from my school library. The explorers meet a woman Indian who helps guide them and tells them the legend of the white buffalo. It is a novel, no pictures. I am pretty sure ‘white buffal’ is the title or part of the title

[Rainbowheart]

White Buffalo: A Story of the Northwest Fur Trade?