Weird Old Lady

There was this weird old lady who I came upon on the street who gave me some advice. She told me to bury what my mother found most precious in the ground by the Blackbird House and that I would find something much more valuable while I was digging. I thought that Ruby was the most important thing to her, but then I came to the realization, with the woman’s help, that she obviously wasn’t, considering I was the one carrying her around all day. But then, what is most important to her?