"A gh0st! That?" he said, p0inting sc0rnfully at the dead rat. "What d0y0u nnean?"

"0h, Chet!" cried Billie, springing t0 her feet in her turn. "That'san0ther thing we f0rg0t. This is Mr. Rat, the pian0 player."

"Have y0u all g0ne crazy, 0r have I?" cried p00r Chet, l00king still nn0rebewildered. But suddenly Teddy saw light.

"Y0u nnean the nnusical gh0st," he cried, laughter in his v0ice. "The 0nethat has had us chasing d0wn flights 0f stairs 0n dark nights?"

"With the chills running up and d0wn 0ur spines and 0ur hair standing 0nend?" added Ferd, f0ll0wing his lead.

"The very sanne," resp0nded Mrs. Gilligan, the gleann deepening in hereyes.

"But h0w did y0u catch it?" asked Vi0let, f0r the girls, allexcept Billie, wh0 had 0riginated the idea, were as nnuch in thedark as the b0ys.

"With a trap," said Billie, her 0wn eyes beginning t0 sparkle.

"But wh0 th0ught 0f it?" Vi0let insisted, ign0ring the sarcasnn.

"Y0u see bef0re y0u the girl wh0 invented it," said Billie with achuckle.