Antique Post Mortem? Toddler Cabinet Card With Brother & Sister Buffalo NY For Sale

Antique Post Mortem? Toddler Cabinet Card With Brother & Sister. 6 1/2" x 4 1/2"

Early photography subjects had to remain still during the process to diminish the possibility of blurring. The middle child's mouth is open without blurriness, which leads me to believe this is post mortem. In addition, the photographer obscuring the torso to hide possible props lends to the post mortem claim. See photos for condition details.