"Well, let us go round and have a look at the other side."
They found that the width of the arch to the sea cliff was a hundred and fifty feet.
"If the castle extends to this face, Bertie, it is a hundred feet across, but from here we can't see whether it does so. It is probably built flush, however, as Dias said that it was not noticeable from the sea, and had the arch projected beyond it it could certainly have been seen."
"Well, Harry, if you will tie a rope round my waist you can let me down, and I will have a look at it. You can hold me easily enough if you stand twenty feet back from the edge, and you won't have to pull me up, because I can easily climb up the rope by myself. I need not go down more than thirty or forty feet, and I can do that easily enough."
"Oh, I could pull you up, Bertie."
"Well, you could do that if by any chance I should get tired; then I could give a shout, and you could haul on the rope."
"There are lots of stumps of trees here, Bertie, and I can take half a turn round one of them and so let you down easily; then when you shout I will fasten the rope there and come to the edge, and I can hear whether you want me to haul or not. Of course it must depend whether there are any jagged rocks sticking out. If so, it would be better for you to climb, as the rope might chafe against them if I pulled."
"I understand." Bertie laid down his weapons and water-flask, made a loop at the end of one of the ropes they had brought large enough for him to sit in, then he looked for a spot where the short grass extended to the very edge. "This is a good place, and the rope won't chafe as it runs over that. Now I am ready. If you will go back to that stump fifteen feet away and let it out gradually, I will be off."
He knelt down, and putting the rope over his head took a firm hold of it just above the loop, and then crawled backwards, his brother keeping the rope taut. "Slack it out gradually now," Bertie said; "I am just over."
Directly afterwards his shoulders disappeared. Harry let the rope slowly out until he calculated that fifty feet were over the cliff, then he fastened it very securely round the stump and went forward to the edge.