There was only one challenge for photographers in the 19th century that we can really see evidence of today, and that is movement. Because the exposure time was slow, subjects had to sit still for a long time. We see stands behind subjects helping them hold their pose, they lean on chairs or tables to hold their balance, or as in this case, there is an adult sitting next to this infant trying to hold him still. But where is the baby’s nose? You can see the child was moving because the hand is blurred and the nose, diminutive on a child at best, was blurred out of existence due to his moving.
The child is another unidentified person in the mystery of the Red Velvet Album. No photographer’s mark is on the photo either.