"I can't tell you whether this has been dug out with a spade or not," he said, putting a point on the oaken cudgel with his big "gully" knife (think of a minister with a knife like that!), "but this I can tell you, that the hand of man has been here or hereabouts!" And with that he leaned over the edge right among the weeds and began scraping away at the bank. It was coated over pretty regularly with a greyish mud which had come down with the last emptying of the pond. This was done periodically, with the avowed purpose of clearing out the Moat and Backwater. Mr. Ball saw to it, under the personal superintendence of Mr. Stennis. And all that day the mad people at the Grange were kept within doors, and the policies were strictly guarded. For the scour of the water escaping down the channel brought with it multitudes of fish--not very large, it is true, but sufficient to be a temptation to every boy within miles. Such, however, was the terror inspired by the inhabitants of Deep Moat Grange, and especially by Daft Jeremy, that those who were bold enough to come at all, rather braved the dangers of the Duke's keepers at the infall of the Backwater into the Brom, than dared to set a foot within those woodland shadows where they knew not what terrors might lurk. The Hayfork Minister went on knocking off big flakes of dried mud with the point of his stick. Then, whistling softly, he started to polish something with vigour. At first I could not in the least see what he was after, but soon a good big square of reddish metal was laid bare. It was not upright in the bank, but leaned a little back, was very deep set, and I could see that it had been intended to slide in grooves. At the time I had no idea as to why it had been put there. But now I know that it must have been constructed for purposes of irrigation. There was, in fact, an old vegetable garden and orchard, still partly enclosed with crumbling walls, not two hundred yards off through the woods. And there is little doubt that it had been the intention of some former travelled master of the Grange to cultivate his table vegetables and fruits on the system of Southern Europe. All, however, was now desolate. Yet the iron plate in the bank, though mud-covered and rusty, had not stuck altogether. Indeed, looking at it closely, it was not difficult to see that it had recently been used. With the Hayfork Minister at one end of the oak branch, and myself at the other, we soon made it budge with a smothered heave-ho! and revealed a regularly bricked tunnel leading apparently into the bowels of the earth. "That is where you are to go, my son!" said Mr. Ablethorpe. "Me!" Mr. Ablethorpe nodded, and scraping away some leaves behind the fallen tree on which we had been sitting together, he disinterred a coil of stout cord, not thick, but very strong, with a red thread running through it. "This has served," he said, "for heavier weights in more dangerous places!"