Possible Clues:

• Re this, one depended on its being false
• Failed to be truthful
• Told a big fib
• German lyric or art-song
• Art song — told porkies
• German song was deceptive
• Wasn't up-front
• Falsified
• Was unbelievable, that is to say, between fifty and five hundred
• That German song was not a true one