It was Jack who made a startling proposition that caught the fancy of the other three from the first.

He had lately been reading an account of a canoe trip made by an English gentleman all the way down the Danube from its source in Germany not far from the Rhine, through Austria-Hungary, along the Serbian border, and then through Rumania until he finally reached the Black Sea, and brought up at Constantinople.

The account was so vividly written up that it appealed strongly to Jack, and his proposition was that they make their way to some place further down the beautiful river than his starting point, charter some kind of a motorboat, and continue the voyage. They could thus get to the Turkish capital in good time after a most interesting trip, take a steamer to London, and come home in that way.

Well, the more they talked it over the stronger grew the inclination to enjoy a water voyage through a most interesting country, the praises of which they had seen sung in many an account they managed to unearth at the library.

Eventually this was just what the daring quartette had done. They were lucky enough to get hold of a pretty fair powerboat that would accommodate four sleepers with some crowding. This they had fitted up to suit themselves, for long experience in camping out had made them wise in many particulars. And, Buster considered this the most important part of the whole business, they had found a little kerosene blue-flame stove something like those they owned at home, upon which many of their future meals were likely to be cooked.

The party had only been a short time on the way when they brought up at the Hungarian capital, where it was planned to spend a couple of days prying around; for they had reason to believe they would run across no large city save Belgrade in Serbia until they crossed the Black Sea and came to Constantinople.

As often happens, the best laid plans often go astray, and, looking back to former scenes, the four chums could pick out several other instances when this had happened to them.

Buster had just finished his long list of eatables, in which he jotted down everything that appealed to his voracious appetite, when Josh was heard saying he had glimpsed Jack coming. All of them therefore jumped up to greet the bearer of the mailbag, being greatly interested in news from the home folks.

“Something has happened, as sure as you live!” exclaimed Josh as the fourth member of the little party drew closer; “look at Jack’s face, will you? He couldn’t be more solemn if he had been told he was going to be hung to-morrow.”

“No bad news from across the sea, I hope, Jack?” faltered Buster.