Salamanders

In Jerusalem (London, 2016), Alan Moore describes the Great Fire of Northampton, 1675. This is historical. However, he describes the Fire as witnessed by time traveling ghosts who see the Salamanders in the flames. This is fantasy. Moore's Salamanders, resembling young women with flames for hair, do not speak but merely laugh whereas, in Tim Powers' The Anubis Gates (London, 1986), Salamanders, here called "yags," converse with the magician who has conjured them. (pp. 259-269) They sound like violins and assume "...roughly human shapes..." like "...burning giants." (p. 260)

The Anubis Gates, involving gods, magic and fantasy time travel, is on the same wavelength as Jerusalem and as Neil Gaiman's The Sandman.

One of the Jerusalem ghosts lists the kinds of elementals for us:

Salamanders, fire;
Undines, water;
Sylphs, wind;
Gnomes, Urks or Urchins, earth.

Lastly, without looking it up now, I think that Narnians saw Salamanders deep underground?