HIS MAJESTY’S land-ship Hotstuff was busy rebunkering and refilling ammunition in a nicely secluded spot under the lee of a cluster of jagged stumps that had once been trees, while her Skipper walked round her and made a careful examination of her skin. She bore, on her blunt bows especially, the marks of many bullet splashes and stars and scars, and on her starboard gun turret a couple of blackened patches of blistered paint where a persistent Hun had tried his ineffectual best to bomb the good ship at close quarters, without any further result than the burnt paint and a series of bullet holes in the bomber. As the Skipper finished his examination, finding neither crack, dent, nor damage to anything deeper than the paintwork, “All complete” was reported to him, and he and his crew proceeded to dine off bully beef, biscuits, and uncooked prunes. The meal was interrupted by a motor-cyclist, who had to leave his cycle on the roadside and plough on foot through the sticky mud to the Hotstuff’s anchorage, with a written message. The Skipper read the message, initialled the envelope as a receipt, and, meditatively chewing on a dry prune, carefully consulted a squared map criss-crossed and wriggled over by a maze of heavy red lines that marked the German trenches, and pricked off a course to where a closer-packed maze of lines was named as a Redoubt. The Signals dispatch-rider had approached the crew with an enormous curiosity and a deep desire to improve his mind and his knowledge on the subject of “Tanks.” But although the copybook maxims have always encouraged the improvement of one’s mind, the crew of the Hotstuff preferred to remember another copybook dictum, “Silence is golden,” and with the warnings of many months soaked into their very marrows, and with a cautious secrecy that by now had become second, if not first, nature to them, returned answers more baffling in their fullness than the deepest silence would have been. “Is it true that them things will turn a point-blank bullet!” asked the dispatch-rider. “Turn them is just the right word, Signals,” said the spokesman. “The armour plating doesn’t stop ’em, you see. They go through, and then by an _in_-genious arrangement of slanted steel venetian shutters just inside the skin, the bullets are turned, rico up’ard on to another set o’ shutters, deflect again out’ards an’ away. So every bullet that hits us returns to the shooters, with slightly decreased velocity nat’rally, but sufficient penetratin’ power to kill at _con_-siderable range.” Signals stared at him suspiciously, but he was so utterly solemn and there was such an entire absence of a twinkling eye or ghostly smile amongst the biscuit-munchers that he was puzzled. “An’ I hear they can go over almost anythin’—trenches, an’ barbed wire, an’ shell-holes, an’ such-like?” he said interrogatively.