Ioway Schoolboys

Group shot of Ioway schoolboys in Oklahoma. Please help with identification if you can.

From the Western History/Genealogy Dept of the Denver Public Library in partnership with the Colorado Historical Society and the Denver Art Museum
Title: A photo of some of the Attawa Indian boys taken in the early opening of the school
Call number: X-30979
Summary: Iowa (Ioway) boys pose with their white instructor beside their clapboard school. The boys wear short cropped hair, sack jackets and trousers, two sit in chairs.
Date: 1870
Photographer: A. C. TuttleDigital restoration by JK