This photograph was taken by the Walter Washington Foster Studio, in Richmond, Virginia. There are more of the Foster photos at the Virginia Historical Society. It was addressed to Miss Barnes, 354 R. Black. The photo was in a trunk belonging to Sarah Ophelia Rose Barnes. She was from Wayne County, North Carolina. Most likely this had been sent to her daughter, Bessie Pauline Barnes Coleman (1886-1944). After her marriage to Thomas Coleman, Bessie Barnes lived in Rocky Mount, North Carolina.
From other photos I’ve seen, this looks to be a nursing uniform from the early 20th Century. Vintage Nursing Uniforms on Pinterest has some wonderful photographs of nurses, and this cap looks similar to one from 1901. Any help in dating this photograph would be very much appreciated!
Wordless Wednesday is a blogging prompt suggested by GeneaBloggers.
Barnes Family History 
Based on the style of the bodice and skirt, I would say early 1900s. So you are in the right track.
Thank you Deborah! The next step for me will be to look into which schools had nursing programs in Richmond in the early 1900s.