Descending to the foot of the _tell_, he made his way to a wady that bordered it on one side. A sluggish current of muddy water flowed through the channel, whose banks were thickly overgrown with reeds. A number of these he cut with his pocket-knife, binding the stalks with tendrils of a trailing plant. With this faggot of reeds in one hand and the bundle he had taken from the aeroplane in the other, he returned to the ruins on the tell. There he stuck the former in the grinning mouth of one of the grotesque animals at the porch; then he passed inside, and once more descended into the underground room, this time, however, letting the stone slab drop into its place above. A few seconds later the bundle of reeds hanging out of the monster's mouth disappeared. The animal, so far from being a solid block, as it appeared, was hollow, and Burnet had climbed into it by means of notches in the wall at one corner of the cellar. He withdrew the reeds: next moment they reappeared at a similar orifice on the other side of the figure, which, like Janus, was double-faced, and with this roughly extemporised broom he swept a quantity of sand over the slab, until it was hidden sufficiently to pass unnoticed except by a careful observer acquainted with its position. This done, he drew the broom back and took it down with him to the dark and airless chamber below. If any watching Arab had seen the young British officer disappear into the earth, he would have been somewhat startled, some twenty minutes later, when the slab was lifted again and an Arab lad cautiously emerged. His head was swathed in a strip of parti-coloured cloth held in position by two thick rings of camel's hair; a dirty, shapeless, yellowish robe descended to his knees; his legs, remarkably brown, were bare; his feet were encased in leather-thonged sandals. He carried a small bundle; across his shoulder was slung a British regulation water-bottle--the only article by which he could have been distinguished from the boatmen who might be seen any day on the Tigris. He lowered the slab, swept sand over it, obliterated the footprints around, and having thrust his reed-broom into the mouth of the stone animal, picked his way through the ruins to the north-west corner of the _tell_, where an uninterrupted view of the country could be obtained.