This is a pattern for a bodice from 1880 for an adult from Katherine's Dress Site
Here is the picture she took of the original
I altered the pattern to be considerably narrower at the hips removed the bustle fit and removed the tabs for a very simple hem line.
Here is my version of it as a children's style bodice [made to be worn without a bustle]
Collar and cuff detail.
Here are very rough sketches of the simple alterations I made to Koshka the Kat's bodice pattern to bring in the hips to remove the bustle fit.