through a stoplight!â
Joe, looking back, cried out, âWeâre paving the avenue with golf balls! The tailgateâs open. Weâre losing them!â
Their cargo was streaming out of the pickup into the crossing. Pedestrians went into frantic contortions as the golf balls rolled under theirfeet. Cars jolted to a halt. Traffic was snarled in four directions.
Chet pulled over to the curb. âWeâre in for it now,â he groaned.
âYou can say that again,â Frank muttered. âHere comes the traffic cop.â
âAnd heâs not too happy about running the obstacle course we just set up,â Joe added.
âEverybody out!â the officer commanded the three youths. âStart picking them up!â
Frank, Joe, and Chet meekly climbed out of the truck and began gathering the golf balls. A group of youngsters pitched in for the fun of it. When the balls were back in the truck, Chet double-checked the tailgate before driving off.
âLucky I didnât get a ticket,â he sighed.
âAnd fortunately nobody got hurt,â Frank said.
They arrived at the Hardy house to find their pals Phil Cohen and Tony Prito waiting for them. Phil was the sensitive, studious type, but could be counted on when Frank and Joe were on a dangerous mission.
Olive-skinned Tony, the son of a Bayport contractor, was another friend who frequently helped the Hardys solve mysteries.
The two were told about Chetâs new business. They agreed to accompany him to the golf course that evening to complete the ball scavenging operation.
Frank and Joe drove to Whisperwood. Theyhad dinner in a roadside restaurant. When they reached the estate, Retson showed them to his guesthouse. From a distance came a constant hissing sound.
âItâs the waterfall,â Retson explained. âIt seems to be whispering all the time. Thatâs why we called our home Whisperwood.â
âDid your son ever come to the guesthouse?â Frank inquired.
âYes, occasionally. You see, Harris used the place while a wing of the mansion was being renovated. Graham liked him and visited him sometimes. Now the work on the house is done and Harris is back in his own quarters.â
Joe described the incident of the note in his jacket pocket. âWeâd like to talk to the butler about it,â he said.
âOf course!â Retson replied. âHarris will have to answer to me if heâs the one responsible.â
Their host led the way back to the mansion, where they confronted the butler.
Joe handed the note to him. Harris became pale as he scrutinized the message. His eyes bulged. His breath came in gasps. He folded the note and handed it back. âWhere did you find this?â he asked.
âIn my jacket pocket, after you fixed it yesterday,â Joe said.
Harris frowned. âIf you think I wrote this, you are mistaken,â he said.
âCan you prove that, Harris?â Retson asked harshly.
âYes, indeed, sir. As you know, I make out the shopping list for the week. Here is the one I just wrote.â Harris drew a sheet of paper from his pocket. âCompare my handwriting with the note Mr. Hardy found in his coat.â
Joe placed the two pieces of paper side by side. Frank looked on. The two scrawls obviously did not match!
âIt seems someone else wrote the warning,â Joe mused.
âBut who?â Frank replied. âWho else lives in this house?â
âJackson, the gardener,â Retson said. âHis wife is our cook. And of course thereâs Mrs. Retson. My wife has had a nervous breakdown. She rarely leaves her room in the east wing. A nurse is on duty with her constantly. You can talk to Miss Hopkins if you want to. But donât bother Mrs. Retson.â
âWeâll have to check out the whole staff,â Frank said.
âWell, get on with the investigation first thing in the morning,â Retson urged. âMy son may have