Its origin is a biblical quotation.

> In a moment, in the twinkling of an eye, at the last trump: for the
> trumpet shall sound, and the dead shall be raised incorruptible, and
> we shall be changed.

> **1 Corinthians 15:52**


[What’s The So Called Last Trump?][1]


> Most post- trib believers equate the Last Trump with the trumpet call
> Jesus will issue to the angels to gather his elect at the time of the
> 2nd Coming

I had to Google the passage to get a bit more context and found this is from the opening of [The Man in the Queue, by Josephine Tey][2] (published 1929). 

> **Murder**
> 
> It was between seven and eight o’clock on a March evening, and all
> over London the bars were being drawn back from pit and gallery doors.
> Bang, thud, and clank. Grim sounds to preface an evening’s amusement.
> But no last trump could have so galvanized the weary attendants on
> Thespis and Terpsichore standing in patient column of four before the
> gates of promise. Here and there, of course, there was no column. At
> the Irving, five people spread themselves over the two steps and
> sacrificed in warmth what they gained in comfort;


I *think* the sentence is saying that the banging, thudding, and clanking sounds  of places opening up are, on the face of it, somewhat unappealing sounds but the queuing theatre goers (*weary attendants on [Thespis][3] and [Terpsichore][4] standing in patient column of four*) reacted with great alacrity to them (as one would expect the trumpet call announcing the second coming to be certainly quite a  galvanizing event and their reaction to the bangs and clanks is being compared as even greater than that).


  [1]: https://gracethrufaith.com/ask-a-bible-teacher/whats-the-so-called-last-trump/
  [2]: https://ebooks.adelaide.edu.au/t/tey/josephine/man_in_the_queue/chapter1.html
  [3]: https://en.wikipedia.org/wiki/Thespis
  [4]: https://en.wikipedia.org/wiki/Terpsichore