“There was an old tulip tree in the Legend of Sleepy Hollow,” she murmured in awe. “And it was close by that the Headless Horseman appeared—”

“Will you please hush?” Louise interrupted. “I’m jittery enough without any build-up from you!”

Some distance ahead stretched a long, narrow bridge with a high wooden railing. By straining their eyes the girls could see that it crossed a mill pond and led in a graceful curve to a rambling manor house of clapboard and stone.

“Mr. Burmaster’s estate!” Louise exclaimed.

“And it looks exactly as I imagined it would!” Penny added in delight. “A perfect setting for the Galloping Hessian!”

“Too spooky if you ask me,” said Louise with a shiver. “Why would anyone build an expensive home in such a lonely place?”

The girls rode on. A group of oaks, heavily matted with wild grapevines, threw a deeper gloom over the road. For a short distance the dense growth of trees hid the estate from view.

Suddenly the girls were startled to hear the sharp, ringing clop-clop of steel-shod hoofs. Unmistakably, the sound came from the direction of the long, narrow bridge.

“There! I knew I heard hoofbeats a moment ago!” Louise whispered nervously. “Maybe it is the Headless Horseman!”

“Be your age!” chided Penny. “We both know there’s no such thing—”