The Seattle Art Museum is woefully lacking in art of any kind from the 1800s and early 1900s. But it does have one small work by Saint-Gaudens. Its title is "Amor Caritas" (Love, Charity) -- bronze, lost wax cast. It form can be classed as "high relief" where the subject is significantly rounded, yet still attached to its background.
For your viewing pleasure are a few photos I took of it recently.