How interesting that you have Vallender in your tree, I have had many contacts with the Vallender history too.
I had known about Harriet & her daughter Rosina previously, & have had contact with others on this name.
Harriet also had a brother Henry born approx 1843.
Rosina went on to marry a George Whitcombe in Wales., she had a sister called Gertrude Maud Cresswell -Vallender.
I was sent a tree on Vallender , if you are interested I can give you more info.
Cheers Amycakes.