"I can not say I am familiar with either of those terms," he replied with a tone full of the questioning he couldn't hide. He considered himself well enough traveled, new much of the world and what was in it. And yet those weapons (for that was obviously what she referred to), were completely foreign to him.
"An island." He repeated what she said rather bluntly. His disbelief at that statement perfectly evident on his face. "Yesterday, I was in England. Today, I am on an island I have never heard of. Of course." Still, he got the distinct, and strange, impression, that she was not lying to him. Which he didn't understand. And yet, his instincts rarely let him down.
River song, though? Her name alone prompted more questions than answers. Still, he had a feeling he would get further by playing along. "Well met, River Song. Robin Hood."