I had discovered the entrance by accident, as it was concealed by vines and shrubbery.

I crawled in there, upon an opportune occasion, with the intention of boring a small hole through the adobe bricks.

But it was not necessary to do that, for the wall was cracked; and in one place I could see into Sampson's room.

This passage now afforded me my opportunity, and I decided to avail myself of it in spite of the very great danger.

Crawling on my hands and knees very stealthily, I got under the shrubbery to the entrance of the passage.