the world > matter > properties of materials > temperature > coldness > extinguishing fire > [noun] > fire-fighting > fire-brigade > man who calls fire-brigade for duty (2)
(a) U.S. a firefighter who is summoned when needed, as opposed to being permanently employed (now historical); †(b) British a man responsible…
A boy or young man responsible for summoning railway workers or firefighters to work. Cf. caller, n. 1c. Now historical.