Half Plate Tintype of Homes

When magnified in Photoshop, it appears that the boy in the center of the mid-ground is black, while the couple near the porch on the left is white. This is a half plate (slightly larger, actually, at 4.5 x 6) sans case of a scarce outdoor scene. Condition is good with some small dings and several small pock marks in the foreground. See scan