Chapter 17 in Ada I, Penguin page 86, describes Adaīs hands:
"Ada explained to her passionate fortunetellere that the circular marblings she shared with Turgenevīs Katya, another innocent girl, were called 'waltzes' in California ( 'because the seņorita will dance all night')" .
 
I was wondering about the word "marblings". Would they be something like the concentric markings VN makes become similar to marble veins in a stone,  or would they rather be like caluses ( from too much waltzing), i.e, marbles as those  glass-spheres played with in childhood?