Of course, the Fireflies came flying along, and when they saw what was going on they began asking one another if anyone had received an invitation.
"It is plain to be seen why they did not invite us," said one old Firefly. "They did not need us because the moon is shining."
"That shows us what their friendship is worth," said another. "If they need our lights, they invite us; if not, we are forgotten."
For a few minutes all the Fireflies flashed with anger and then the old Firefly said. "I think we can have revenge if all of you will do as I tell you, and if I am not much mistaken those Goblin fellows will remember us the next time they have a frolic, even if they do not need us."
All the Fireflies wanted to know what the old Firefly had in his mind, but not a word would he tell them about his plan until they ran about and called together all the Fireflies for miles and miles around.
Of course, it did not take those sprightly little creatures long to fly miles and miles, and pretty soon in one corner of the woods were gathered together thousands of Fireflies.
"My plan is this," said the old Firefly when they were all there, "the Goblins are to go sailing on the lily pads after the frolic and we will go around to all the rocks and alight on all of them, for that is where they live, and when they return from their sail they will think their homes are on fire.
"Shine as brightly as you can, every one of you, and don't wink or blink, so the Goblins will not suspect us. They will have a good fright, if nothing else."
Away went the Fireflies in groups of thousands, and pretty soon all the rocks in the woods were covered; but not until the Goblins returned from their moonlight sail did the Fireflies let their bright lights be seen.
The Goblins stopped every one when they reached the woods, for all the rocks were a blaze of light. "Oh, our homes!" they all cried; "someone has set them on fire. What shall we do?"