The Spaniard’s eye glittered when he saw the yellow lustre of the gold, and his heart was bitter that he did not have a share of it. He soon learned where it came from, and rightly surmised that there was more in the same treasury, ready to be bestowed for similar service to that which the unready Baumstein had so emphatically rejected; so Rego, watching his opportunity, stole away secretly to Von Richenbach and offered his aid in the capture of the castle, should suitable compensation be tendered him. Heinrich questioned him closely regarding the interior arrangements of the castle, and asked him if he could find any means of letting down the drawbridge and raising the portcullis in the night. This, Rego said quite truly, was impossible, as the guard at the gate, vigilant enough before, had become much more so since the attempted bribery of the Captain. There was, however, one way by which the castle might be entered, and that entailed a most perilous adventure. There was a platform between two of the lofty, steep roofs, so elevated that it gave a view over all the valley. On this platform a sentinel was stationed night and day, whose duty was that of outlook, like a man on the cross-trees of a ship. From this platform a stair, narrow at the top, but widening as it descended to the lower stories, gave access to the whole castle. If, then, a besieger constructed a ladder of enormous length, it might be placed at night on the narrow ledge of rock far below this platform, standing almost perpendicular, and by this means man after man would be enabled to reach the roof of the castle, and, under the guidance of Rego, gain admittance to the lower rooms unsuspected. “But the sentinel?” objected Von Richenbach. “The sentinel I will myself slay. I will steal up behind him in the night when you make your assault, and running my knife into his neck, fling him over the castle wall; then I shall be ready to guide you down into the courtyard.” Von Richenbach, remembering the sheer precipice of rock at the foot of the castle walls and the dizzy height of the castle roof above the rock, could scarcely forbear a shudder at the thought of climbing so high on a shaky ladder, even if such a ladder could be made, of which he had some doubts. The scheme did not seem so feasible as the Spaniard appeared to imagine. “Could you not let down a rope ladder from the platform when you had slain the sentinel, and thus allow us to climb by that?”