I tried to upload the same Trove info as you have put up Judith, including the shoe connection ! Something happened to my post, possibly left it too long unposted.
Anyway, I too was going to point out that Mary was reading the Spanish history so I suspect some connection was there. The photograph of Mary and family in the book "Sassafras : A history of Settlement and its People" shows her clearly having darker skin tone.
I keep coming back to this question again and again so I hope one day an answer will come.