The Land of the Changing Sun — William N. Harben

The balloon seemed scarcely to move, though it was slowly sinking toward the ocean of white clouds which hung between it and the earth. The two inmates of the car were insensible; their faces were bloodless, their cheeks sunken. They were both young and handsome. Harry Johnston, an American, was as dark and sallow as a Spaniard. Charles Thorndyke, an English gentleman. Johnston was the first to come to consciousness as the balloon sank into less rarefied atmosphere. He opened his eyes dreamily and looked curiously at the white face of his friend in his lap. Then he shook him and tried to call his name, but his lips made no sound