He held out the coins towards the man on the horse. Always a creature of impulse, Sydney Beaton gave way to the worst impulse he had ever had yet; in other words, he all at once went stark, staring mad. The old gentleman's umbrella was under his arm, in his left hand were the two coins, in his right the sovereign purse, still open. A heavy gold chain stretched from pocket to pocket across his waistcoat unguarded. Probably there was a handsome gold watch at the other end of it. No thought of anything of the kind had been in Beaton's mind one instant; the next he stepped forward and, snatching at the unguarded chain, had it in his possession before he himself clearly realised what he was doing. The act was so audacious, so instantaneous, so unexpected, so astounding, that for three or four seconds even the victim did not appreciate what had happened. Then he shouted, so that he might have been heard outside the park: "The scoundrel's taken my watch and chain!" Then his companion became alive to what had occurred, and the man on the horse to whom he had been about to give the coins, and presently everyone within sight and earshot. It is conceivable, and even probable, that Beaton did not understand what he was doing till he had done it; it was only when he saw the watch and chain in his own hand that understanding really came. He knew he was a thief; and the first instinct of a thief was born within him, the instinct of self-preservation. In a moment all his energies were centred in an attempt to escape. He rushed across the path, vaulted over the railing, tore across the grass as fast as his feet could carry him, with the chase at his heels. The old gentleman could not do much in the way of chasing, but seemingly his companion could, and there, were others who joined him who plainly were still capable of running after such a quarry. Swift-footed though he knew himself to be, before he had taken many steps Sydney knew that he would owe not a little to fortune if he escaped scot free. His impulse was to hurl from him the incriminating watch and chain, but that was an impulse to which he did not yield. It would do him no good; everyone would see him throw it, just as everyone had seen him take it. The watch would certainly be damaged, perhaps ruined; there would be nothing gained by treating it in such brutal fashion. So he crammed it into his jacket pocket, and set himself to move yet faster. The victim's companion was uncomfortably close behind him.