I sincerely hope you don't mind all this tl;dr
Not at first, at least. No, instead they simply stopped on the outer side of the fence. [He smiles widely to show it's fine; as long as it's out of curiosity he doesn't mind interruptions. And back to story-telling voice:]
"The maid was terrified, of course, but still she made her way down to where the trolls waited. She even curtsied and bade them welcome-- go figure. One of the trolls then stepped forward — an ancient crone, ugly as sin, with warts all over her face and the largest nose you've ever seen — and spoke in a raspy voice: 'We have come to retrieve our child.' 'Your child is here and unharmed, and I will gladly free him even if I'll get scolded for it later', answered the maid. 'But first, honourable mother, please tell me how to cure the man whom your child has bitten. He's not a bad person and he doesn't deserve to die, and I'm sure he will look upon trolls more kindly in the future if you save him this time.'
The old crone answered that any human bitten by a troll will invariably die within three days unless two things are done. 'Since we have seen how good you have been to our child', she said, 'we will tell you what those two things are'. And she started singing: [Puck, for the record, doesn't sing; he just recites it in a rhytmical fashion]
The person who holds him dearest of all And urgently wishes his death to forestall Must give to the trolls all things that she owns Silver, house, clothing and precious stones Naught must she keep; all must she give All so that the boy may still live After this selfless deed is done Half the poison will soon be gone
The maid thanked the crone, and asked that she may tell the other people at the farm what she had just learned. Now, at this point, dawn was approaching, and as trolls don't care much for sunlight they agreed to this. 'We will be back tomorrow night to collect our payment', said the crone. And with that, they took their leave. The maid hurried into the boy's bedchamber and told his parents of what had happened. 'Of course I love my son', said the farmer, 'but I'm not going to give everything I own to a pack of trolls because of it.' 'No one can love a person more than his mother', said the farmer's wife, 'but I don't trust that those trolls were telling the truth about this being the only way to save our son'.
Now there was no one left to ask to help save the sick boy. Our poor maid wept, for she truly didn't want him to die, and it was with a heavy heart that she waited outside the following evening for the trolls to show up once again."