There's a Google books snippet that looks to be an extract from her father's will, describing her as "Helen Fiske Evans whose address is in care of Miss Gaddis, 218 Ridgewood Road, Baltimore 10, Maryland".
Did you have that?
https://books.google.it/books?id=06PyShQqHxQC&q="Helen+Fiske+Evans"&dq="He len+Fiske+Evans"&hl=en&sa=X&ved=0ahUKEwiGxIrChLTnA hUMxosKHZVFBXcQ6AEIRjAE
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