imagine things, that's all. Look for yourself, and see his fire burning. That's evidence of Bill being on the spot. And just then I saw some person pass in front of the blaze. It's all right, Lanky."
"But look there," said the other skater, "who's that crossing from the shore to the island? I declare, two, three of 'em. Bill's going to have more company than just us two."
Frank was surprised himself to discover the moving figures. They seemed to be endeavoring to advance with more or less caution, as though desirous of coming upon the camper without any notice.
"A set of tramps meaning to gobble poor old Bill's camp, and capture anything he's got," muttered Lanky, as the two boys skated quietly behind an outlying spur of the island, where they too could advance without being noticed.
"Hold on, apparently you didn't notice all I did," said Frank, in a low but earnest tone.
"Meaning what?" demanded his comrade, eagerly.
"Why those three chaps were dressed in uniform; and unless my eyes deceive me in this moonlight,the big fellow in the lead had a mighty familiar look, Lanky."
"You don't mean Chief Hogg?" exclaimed the one addressed, in rising alarm.
