Family Photos (Who are these ancestors?)

More family photos to share--but most of these unidentified by me. Can you help with the detective work? Let me know if you know the identities of any of these unnamed individuals!

Back reads "Henry Gardner". 
Can someone confirm if this is Henry (Hank) Gardner, brother of Betty Mae (Gardner) Youngs?

Cute baby, but nothing written on the back.

Nothing written on the back.
Photo jacket stamped "Graeff's Studio, Oxford, NY"

Nothing written on the back.  Wonder if these are Coltons down in Florida where they moved at retirement age.

Back of photo reads "1 day fishing at Vero Beach *een Back of on this is a shark"
This could be in Florida where some of the Coltons moved.  Two of the brothers were known to fish together.

Nothing on back of photo.  Believe this is one of Betty Mae (Gardner) Youngs's brothers.  Similar photos with same background show Betty and husband Eric Tyler Youngs.

Nothing on back of photo, but photo was tacked within a paper sleeve saying:
Roll Developed, 8 Prints, 25c
THE BALDWIN STUDIO
1609-11 Hodiament Avenue
St. Louis, Mo.