"Are you sure you're quite right in your head, Rooum?"
"Ah," he cried, "don't you think I just fancy it, my lad! Nothing so
easy! I thought you guessed that other time, on the new road ... it's as
plain as a pikestaff... no, no, no! _I_ shall be telling _you_ something
about molecules one of these days!"
We walked for a time in silence.