The Golden Bat by Fred M. White — Read

Ray grinned to himself under cover of darkness. Here was a fine check to the conspirators who had come all this way from England with the cream of the loot hidden in that iron-bound box which was obviously destined to pass into the possession of the man called van Rooden. Ray had not the remotest idea who van Rooden was, but he did not doubt that he was one of those notorious international 'fences' whose business it is to deal in stolen treasures and transport them across the Atlantic where they find a ready sale. Half an hour later, and the transaction would have been complete, but as it was, Keen's plans had been blown to the winds, and in all probability he would now have to look for a fresh outlet for the results of his audacious enterprises. A less astute officer than Ray would have gone straight to the Rotterdam police and laid his information. But Ray knew better than that. He was going to accompany that iron-bound box back to England and take the whole gang red-handed when the proper time came.

Meanwhile, he had plenty to do. He certainly wanted to have a few words with the head of the detective staff in Rotterdam, where he knew he would find some one who spoke English, and very probably an international officer who was more or less under the instructions of Mr.