"No takers?"
Selwyn began walking to the edge of the paddock, leaving the children to stay or follow as they chose.
"Your belongings will be safe here," he told them, "but you might want to bring your wands."
"Gnomes often get into gardens because they simply love the taste of fresh foliage, especially decorative plants like daffodils, gerberas and, of course, roses," since nobody seemed willing to contribute to the lesson, Selwyn slipped into lecture mode. He preferred listening to the sound of his own voice, anyway.
"It causes terrible consternation for avid gardeners, especially muggles who often take out their anger at the wreckage of their pride and joy on the local wildlife."
They reached the low stone walls of the rose gardens, above which thorns tangled, though not many roses could be seen. Certainly, none of those that could were whole.
"As I was saying, the most effective way to de-gnome a garden is to stun them. It's humane and safe for both you and the gnomes.
Technically, if you're without your wand, you can just hit them over the head with a two-by-four; gnomes are well known for their thick skulls and that would stun them just as well, but I don't want to see anybody doing that today."
"If nobody has any questions, I believe we can get started."