Now and then a sheep wandered off the heather to stare at me. A heron flopped down to a pool in the stream and started to fish, taking no more notice of me than if I had been a milestone. On I went, trundling my loads of stone, with the heavy step of the professional.Soon I grew warm, and the dust on my face changed into solid and abiding grit. I was already counting the hours till evening should put a limit to Mr Turnbull's monotonous toil. Suddenly a crisp voice spoke from the road, and looking up I saw a little Ford two-seater,and a round-faced young man in a bowler hat.