Summer on the Lakes, in 1843
“that is too equivocal a position, whether in modern mythology, or Hoffman's tales.”
Fuller, Margaret. Summer on the Lakes, in 1843. Boston: Little, Brown & Co., 1844.
Inferred Fuller names 'Hoffman's tales' explicitly in the context of elemental spirits (gnomes, salamanders). The most likely referent is Hoffmann's Fantasiestücke (1814-15), which features elemental spirits prominently, especially 'Der goldne Topf' ('The Golden Pot'), where a salamander figure plays a central role.