The idea was preposterous. Marrion imagined herself arriving at the castle, where the servants were ever early astir, in her bathing dress with the Captain! So she hastily drew a red herring across the trail. "And was the fish real big, Captain Duke?" she asked. "Big! I tell you it was the biggest I, or, for the matter of that, anyone else ever caught in the castle pool." "Fish are aye big when they are in the water, I'm thinking," she cast back at him, as, loosing her seaweed hold, she struck out. He sprang up. "You're not going to try and cross now!" he cried, pointing to where in mid-stream a wide oily streak told that tide and river were flowing out fast. "The ebb is at its strongest. Marmie, don't be a fool!" She gave a quick glance forward, then looked back to smile farewell. "Aye, it's strong, but I've done it before now. There's no fear for me, Captain Duke." So saying she turned her head upstream, seeing indeed that she would have to be careful not to be swept past her bearings when she got to mid-channel; so she did not see Marmaduke tear off his creel, his coat, and waistcoat, and, in thin ruffled shirt and kersey breeches, launch himself into the water. But his tremendous underwater strokes soon brought him up almost beside her to shake his curly head like a retriever. She looked at him startled and quickened her strokes, whereupon he changed to overhand and ranged up beside her without effort. "Where did you learn yon?" she asked, more for something to break a silence which made her heart beat than from curiosity. "You usen't to swim that way." "In the Indies," he replied, laughing. "I must teach it to you; but it isn't much good in currents. By Jove, how jolly this is. Why the deuce did I take the boat? I say--look out! I feel the trend of the stream." Small doubt of that. They were through the backwater and in another minute would be in the full of outgoing river and outgoing tide. The opposite bank seemed slipping past them rapidly. Duke changed his stroke instantly and ranged up beside Marrion. "It will be easier together," he said, passing his hand over her shoulder, and obediently she passed hers over his. "Now then, together!" he cried. "And if you tire you know what to do; and keep time, there's a good girl." So they struck off, the forward lunge of his long legs aiding hers, that were so far behind in strength. Thus they battled the stream shoulder to shoulder, almost cheek to cheek, her long loose hair sweeping across him, until the worst of it was over and the girl would fain have loosed her grip and turned shorewards definitely. "Not yet!" he laughed. "Let's swim out to sea a bit! Look--isn't it worth it?"