Thief of Time - Command

'Yes, I asked if I might have a few days' leave,' said Susan. 'Pressing family matters, I'm afraid. I have prepared some work for the children to get on with, of course.'

Madam Frout hesitated. Susan didn't have time for this, either. She snapped her fingers.

'MY GOODNESS, THAT'D BE A RELIEF,' she said, in a voice whose harmonics went all the way into the subconscious. 'IF WE DON'T SLOW HER DOWN WE'LL RUN OUT OF THINGS TO TEACH THEM! SHE HAS BEEN PERFORMING SMALL MIRACLES ON A DAILY BASIS AND DESERVES A RAISE.'

Then she sat back, snapped her fingers again, and watched the words settle into the forefront of Madam Frours mind. The woman's lips actually moved.

'Why, yes, of course,' she murmured at last. 'You have been working very hard... and... and,' and since there are things even a voice of eldritch command can't achieve and one of them is to get extra money out of a head teacher, 'we shall have to think about a little increment for you one of these days.’

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The Thief of Time - p100-101