The scene on Mars' inner moon...
The most remarkable feature of the following two days was the fact that we survived them. We found food in plenty; and as we were always near the river, we never suffered for lack of water; but by day and by night we were constantly in danger of attack by the roving flesh-eaters.
We always sought to save ourselves by climbing into trees, but upon three occasions we were taken by surprise; and I was forced to fall back upon my sword, which had seemed to me a most inadequate weapon of defense against some of the ferocious beasts that assailed us.
However, in these three instances, I managed to kill our attackers, although, I must confess, that it seemed to me then, and still does, wholly a matter of luck that I succeeded.
By now, Ozara was in a more sanguine frame of mind. Having survived this long, she felt that it was entirely possible that we might live to reach Domnia, although originally she had been confident that we could not come through the first night alive.
She was often quite gay now, and she was really very good company. Especially was this true on the morning of the third day as we were making good progress towards our goal.
The forest seemed to be unusually quiet; and we had seen no dangerous beasts all that day, when suddenly a chorus of hideous roars arose all about us; and simultaneously a score or more of creatures dropped from the concealing foliage of the trees about us.
Ozara’s happy chatter died on her lips. “The Masenas!” she cried.
As they surrounded us and started to close in on us, their roaring ceased and they commenced to meow and purr. This, to me, seemed far more horrifying…
Edgar Rice Burroughs, Swords of Mars (1936)