In Chapter 14 of Rilla of Ingleside, Rilla gets up a Junior Red Cross fundraising concert. The concert goes smoothly, but at a terrible moment Rilla is stricken by bad news:

She must get away–she must rush home–she must be alone. She could not go out there and play for drills and give readings and take part in dialogues now. It would spoil half the concert; but that did not matter–nothing mattered. Was this she, Rilla Blythe–this tortured thing, who had been quite happy a few minutes ago? Outside, a quartette was singing “We’ll never let the old flag fall”–the music seemed to be coming from some remote distance. Why couldn’t she cry, as she had cried when Jem told them he must go? If she could cry perhaps this horrible something that seemed to have seized on her very life might let go. But no tears came! Where were her scarf and coat? She must get away and hide herself like an animal hurt to the death.

From the Encyclopedia of Music in Canada, We’ll Never Let the Old Flag Fall is a popular World War I marching song about the Union Jack, written and published in 1914.

We’ll Never Let the Old Flag Fall
Albert Erroll MacNutt (words), M. F. Kelly (music), 1914

Britain’s flag has always stood for Justice,
Britain’s hope has always been for Peace,
Britain’s foes have known that they could trust us
To do our best to make the cannons cease.
Britain’s blood will never stand for insult
Britain’s sons will rally at her call,
Britain’s pride will never let her exult,
But we’ll never let the old flag fall.

We’ll never let our old flag fall,
For we love it the best of all,
We don’t want to fight to’ show our might,
But when we start, we’ll fight, fight, fight.
In peace or war, our voices ring,
“My Country, ‘Tis of Thee” we sing,
At the sound of her call, we’ll show them all,
We’ll never let our old flag fall.

Britain’s sons have always call’d her Mother,
Britain’s sons have always lov’d her best,
Britain’s sons would die to show they love her,
the dear old Flag laid on each manly breast,
Britain’s ships have always rul’d the ocean
Britain’s sons will serve her one and all.
Britain’s sons will show their true devotion
And we’ll never let the old flag fall.

http://www.collectionscanada.ca/obj/m2/f7/10153.mp3