Great-great-grandmother Martha Woodruff

My dad's mother (and my grandmother) - Caroline Orme Wheal - was born in London, as were her ancestors before her. We have traced her family back to the Woodruff family - which included Nell (this name will appear again in other generations!), Carrie (this one, too!), Kitty, Alfred, and Sarah, who was my great-grandmother. Their mother was this woman pictured here:Identification of this elderly lady is a little shaky but my dad wrote on the back of this photo "Great-great-grandmother Woodruff (I think)." That's good enough for me! Family legend has it that Martha Woodruff and her husband (his name has been lost to history) had a shoemaking business in London and that they obtained one of the first Singer sewing machines, which were first mass-produced in the mid-1800s. Martha was probably born around 1825.