Carte de Visite/CDV of a man identified as "Uncle Nathan Beal, Leller [?] and Chester's grandfather". The photograph was taken by the E. C. Swain studio in Malden, Massachusetts.
"Leller" might be Lester, Luther, Lettie, etc.
Hopefully a reader will recognize the clues of names and locale to be able to identify Nathan further; if so, please leave a comment or contact me directly.