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 its clutch. It’s a bad place, the great Grimpen Mire.”

“And you say you can penetrate it?”

“Yes, there are one or two paths which a very active man can take. I have found them out.”

“But why should you wish to go into so horrible a place?”

“Well, you see the hills beyond? They are really islands cut off on all sides by the impassable mire, which has crawled round them in the course of years. That is where the rare plants and the butterflies are, if you have the wit to reach them.”

“I shall try my luck some day.”

He looked at me with a surprised face. “For God’s sake put such an idea out of your mind,” said he. “Your blood would be upon my head. I assure you that there would not be the least chance of your coming back alive. It is only by remembering certain complex landmarks that I am able to do it.”

“Halloa!” I cried. “What is that?”