My heart leapt within me as I went forward to it, finding that above was a round, well-like shaft, which led to the surface, while in the wall were iron footholds.

I gained the bottom, and grasping the small, rusted iron rails commenced a slow and difficult ascent.

Not an instant too soon, however, for ere I had placed my foot upon the first rung of the ladder a noise like thunder sounded from the tunnel, and the black waters rose angrily to meet me, washing about my legs as I climbed higher up, and filling the sewer to its roof.

For a few moments the water remained at that level, and then the torrent slowly receded to its original height as the flushing wave rushed on towards the outfall.

A cold perspiration broke out upon me. I saw how I had been within an ace of death, and shuddered as I glanced below.

Then, ascending as quickly as my shattered nerves and swimming head would allow, I found above me a closed grating, through which I could hear the roar of the London traffic above.

I shouted, but could attract no attention.

To push up the iron was impossible, for I saw that it was locked.

A woman passed close by, and I shouted to her. She turned and looked in an opposite direction, surprised to see no one. She never suspected anyone being beneath the roadway.

An omnibus rumbled over me, and I saw that it was a green “Bayswater,” from which I concluded that I must be beneath Oxford Street.