This is a cabinet card of three handsome brothers. The youngest boy, Adolf, who looks about 18 or 19, is on the left leaning against a painted wooden prop. The eldest brother, George (or Papa Baur) is in the middle sitting on the fake stone wall. To the right is the middle child, Johannes, or John. His hand is resting on an interesting looking table where he has set down his hat.
If you know who these fine young men may be, let us know in the comments!