Captain Colby remained at the farm a week and during that time gave the Rover boys as much instruction as possible in the art of flying in general and the art of managing the biplane in particular. He had brought with him several books on flying and recommended that these be read carefully.
"You all seem to take to it naturally," he said. "I don't believe you'll have any trouble excepting on rare occasions--and every person who goes up is bound to have that."
After the captain left the boys took several flights, some of them quite long. They sailed over Dexter's Corners and the railroad station of Oak Run, and at the latter place nearly scared old Ricks, the stationmaster, into a fit, by swooping down close to where he was standing. Dick also made a flight to the Marley place, and visited the Snubble homestead.
"What did you find out?" asked Sam, when he came back from the last-named trip.
"Sobber and Crabtree have left the old mill," answered Dick. "The Snubble boys were over there twice and they couldn't see a sign of anybody."
"Have they any idea where they went to?" asked Tom.
"No. They said Crabtree sold the mill property."
"Besser you look out for dem scalavags," was the advice from Hans. "I vouldn't drust dem mit mine eyes open alretty!"
The next day the German youth had to leave, and all the boys went down to the railroad station in the touring car to see him off. Old Ricks was there and he glared souring at the Rovers when he saw them.
"I guess he didn't like that flying affair," was Sam's comment.
"Oh, he's thinking of the time Tom put the cannon cracker in the bonfire and made him think some dynamite had gone off," returned Dick, with a grin.
"Or the time Tom gave him the cigar that turned into a snake!" went on Sam, with a laugh.
"Get out of the way! Get out of the way, you boys!" cried the old stationmaster, as he brushed past, hitting Tom in the knee with a suit case he was carrying. The train that carried Hans had rolled away, leaving Ricks and the Rovers alone on the little platform.
"Why, Mr. Ricks, what's your rush?" asked Tom, sweetly. "Going to a wedding?"
"No, I ain't going to no wedding!" grunted old Ricks. "I don't want you young fellers to git in my way, that's all."