I think that's lace trim on the chair arm, like a furniture protector. He seems to be reading or holding a very small book. He sort of resembles Gregory Peck from this angle, reading to Scout.

When everyone was dressed up in their best for church, or..it could be for a funeral after noticing the somber looks of the children and the man with the handkerchief in the rocking chair. I'm sure there is a story here of happiness or woe--excellent photo Dave, it leaves a lot for contemplation.