In Chapter 6 of Rainbow Valley, the runaway girl Mary Vance goes to church with the Merediths:

…Some wondered who the shabby little girl with the manse children was she did not attract much attention. She listened to the sermon with outward decorum and joined lustily in the singing. She had, it appeared, a clear, strong voice and a good ear.

“His blood can make the violets clean,” carolled Mary blithely. Mrs. Jimmy Milgrave, whose pew was just in front of the manse pew, turned suddenly and looked the child over from top to toe. Mary, in a mere superfluity of naughtiness, stuck out her tongue at Mrs. Milgrave, much to Una’s horror.”

Mary mispronounced the line “His blood can make the foulest clean.”

O For a Thousand Tongues to Sing
Charles Wesley

O for a thousand tongues to sing
My great Redeemer’s praise
The glories of my God and King
And the triumphs of His grace
The glories of my God and King
And the triumphs of His grace

My gracious Master and my God
Come assist me to proclaim
And spread through all the earth abroad
All the honours of Thy Name
And spread through all the earth abroad
All the honours of Thy Name

Jesus the Name that charms our fears
And that bids our sorrows cease
‘Tis music in the sinner’s ears
‘Tis life and health and peace
‘Tis music in the sinner’s ears
‘Tis life and health and peace

He breaks the power of cancelled sin
And He sets the prisoner free
His blood can make the foulest clean
His precious blood availed for me
His blood can make the foulest clean
His precious blood availed for me

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