As the police continue their manhunt for the vigilante The Whistler, I discover yet another career option my guidance counselor never informed me was available:
It's never made clear which major metropolis The Whistler stories take place in. But apparently they had SEVERAL whistling teachers. All of whom were able to earn a living by teaching whistling, it would seem.
Which is just another reason to revive this strip...
From National Comics #52 (1946).