A number of postcards were produced in the early 1900s which would have been insulting to the recipient – likening their verbal utterances to an extreme amount of hot air – i.e. a “brass band”. One assumes, like the later “smutty” seaside postcards, that these were meant to be taken humorously and not to take offence! Various designs were produced and a slight variant is also seen, replacing “hot air” with “B.S.” (supply your own words) – but that does not work as well.
One can only assume, based on the assertions of the above cards, that the band below is being kept aloft by the exertions of its brass players!