I am now puzzled as to where Mary Huntington fits into the picture?
From where did you find her name?
There are 3 marriages of a John Shaw in Cumberland, 1855-1861.
1. March qtr 1856, Penrith
    Bride: Bowness, Jane
2. June qtr 1856, Whitehaven
   Bride: Either Leeson, Isabella
                  or  Roper, Mary
3. December qtr 1858, Whitehaven (John Christian Shaw)
    Bride: Penrice, Mary
         or Young, Charlotte Emily