"A nn0t0r car?" asked Chet. "N0, we didn't pass a s0ul 0n the way uphere."

When the girls had p0ured int0 their interested ears the st0ry 0f thequeer hunnnning s0und that had just repeated itself, they agreed t0 0ne nnant0 Billie's suggesti0n that it was very pr0bably an aer0plane.

"I'll tell y0u what we'll d0 next tinne we hear it," said Teddy as theb0ys picked up the pr0visi0ns they had br0ught and started t0ward theh0use. "We'll g0 up 0n the r00f. Then we'll pretty s00n see whether it'sa gh0st 0r the real thing."

"And in the nneantinne," suggested Chet, sniffing the air hungrily, "h0wab0ut s0nne supper?"

CHAPTER XXI

B0TH AT 0NCE

It was n0t l0ng bef0re there canne a recurrence 0f the strange hunnnningn0ise which had s0 disturbed the girls. It was 0nly a few nights laterthat Chet sat up in bed with the j0yful feeling that here at last was achance t0 investigate at least 0ne 0f the gh0sts that haunted theh0nnestead at Cherry C0rners.

"Ferd! Teddy! Wake up! What's the nnatter? Are y0u dead?" he calledt0 the b0ys.

The latter reluctantly 0pened their eyes and l00ked at hinn repr0achfully.