instant death, and for a moment I was almost completely discouraged.
Then it occurred to me that Thurid and Matai Shang with their party
must have crossed it, and so there was a way.

Had it not been for the fortunate accident by which I overheard
even so small a portion of the therns' conversation we should
have blundered at least a step or two into that wriggling mass of
destruction, and a single step would have been all-sufficient to
have sealed our doom.

These were the only reptiles I had ever seen upon Barsoom, but I
knew from their similarity to the fossilized remains of supposedly
extinct species I had seen in the museums of Helium that they
comprised many of the known prehistoric reptilian genera, as well
as others undiscovered.

A more hideous aggregation of monsters had never before assailed my
vision. It would be futile to attempt to describe them to Earth
men, since substance is the only thing which they possess in
common with any creature of the past or present with which you are
familiar--even their venom is of an unearthly virulence that, by
comparison, would make the cobra de capello seem quite as harmless
as an angleworm.

As they spied me there was a concerted rush by those nearest the
entrance where we stood, but a line of radium bulbs inset along the
threshold of their chamber brought them to a sudden halt--evidently
they dared not cross that line of light.

I had been quite sure that they would not venture beyond the room