Her terse genealogical sketch is here.
Upgrade image, replacing one originally posted 9 July 2011, from eBay. Also posted to The Belle Époque - 1890 to 1914 Album here.
The Countess wears a frilly cape, an important outer garment in the Belle Époque, and long sleeves in this 1896 Sargent portrait.
Keywords: 1896, Sargent, Laura Spinola, Laura Spinola Nunez del Castillo, Spinola family, Nunez del Castillo family, Countess, high enclosing neckline, choker necklace, cape, collar, frills, chemisette, lone sleeves, cuffs, choker necklace, walking stick