He was a mystery, but his willingness and his ready obedience, his haunting smile and kindly blue eyes, had made him a favourite with the warders, who treated him with a lack of harshness that almost amounted to kindness. And as he worked as though his life depended upon it, and always with the same sad smile, he was allowed more freedom of movement within the limits of the warder's chain than any other convict.
Once or twice during the day, whenever they were close together, No. 303 questioned Rupert as to the part of the moorlands they were on, how far from Princetown or Moretonhampstead.
"Keep your eyes open, the chance may come to-day."
But Rupert shook his head. What chance had they, surrounded by armed men, in the broad light of day? True, there was always the chance of a fog, and though in the spring they were fairly common, as the summer advanced their appearance was rare.
To-day the heat was oppressive, and though the sun shone in a cloudless sky a thin, almost imperceptible, haze hung over the tors, and the peaks shone with a curious light. Rupert noted this, for it sometimes was the precursor of a summer fog, and when these fogs did come they appeared suddenly, without warning—and as suddenly disappeared.
In the afternoon a slight breeze, which now and then had blown from the hills, died down. There was not a breath of air. It was with a sigh of relief that even the warders saw the sun sink beneath the bank of grey cloud that had covered the western sky.
The perspiration poured down the convicts' faces as they worked, and the warders began to throw anxious glances behind them where Great Tor had already disappeared in an ominous cloud-bank, which rolled down its slopes like cotton-wool. The field in which they were working was the furthest one from the prison, and just above Two Bridges, which lay at the bottom of a steep slope of rough grass. The field was separated from the road by another one, and a high wall without any gates ran down the whole length of the road.
The head warder pulled out his watch. It was a quarter to five. He glanced at the low, white clouds which the least puff of wind might at any moment bring down and blot out the landscape.
He sounded his whistle, and the convicts at once began to form up and the guard to close in. There was a few moments' delay while the rakes and forks were collected and the waggon brought up from the end of the field.
"Stand next me," No. 303 whispered to Rupert. "Our chance has come. You won't fail me!"