Case or Camp Photos - Unidentified

These photos were found in the old satchel holding the papers of Emillus Case, son of Caleb and Sophia Camp Case.  Of course, they are unidentified.  The only hope of identification would be if someone of the family has something similar to help name these family members.  

I believe they are daguerrotypes, which usually date between 1840 - 1860.  I've actually thought that one of them might be Emillus himself, another one a brother and perhaps, the last might be the sister who lived with them, Lydia.
But that is pure speculation.
Could anyone help?