Today I was in a very ambitious Antique store admiring--among other strange curios--old tin-type photographs. As you may know from this post, I have a real love for them.
I recently came across this post by www.retronaut.co on "The Invisible Mother."
Apparently, "This was the practice where the mother, often disguised or hiding, often under a spread, holds her baby tightly for the photographer to ensure a sharply focused image."
What a quirk of pragmatic thought!