SISTERS AND BROTHERS. The trio crowded on the step is almost certainly two sisters flanking a little brother. The older sister wears a ring.
Photographs taken on black and white glass negatives by African American photographer(s) John Johnson and Earl McWilliams from 1910 to 1925 in Lincoln, Nebraska. Douglas Keister has 280 5x7 glass negatives taken by these photographers. Larger scans available on request.