"Here." was the answer. "I'm on the forward deck."

"Do you see anything?"

"No, it's too dark. Turn the search-light this way."

"I will," shouted Mr. Damon, and a moment later the gleam of the
powerful lantern brought Tom clearly into view, as he stood on the
small forward observation platform in the bow of the Black Hawk.

An instant later the young inventor let out a startled cry.

"What is it?" demanded Mr. Durban.

"An immense snake!" shouted Tom. "It's wound around a tree, and
partly twined around the ship! That's why we couldn't go up! I'm
going to shoot it."

They looked to where he pointed, and there, in the glare of the
light, could be seen an immense python, fully twenty-five feet long,
the forward part of its fat ugly body circled around the slender
prow of the airship, while the folds of the tail were about a big
tree.

Tom Swift raised his electric rifle, took quick aim, and, having set
it to deliver a moderate charge, pressed the button. The result was
surprising, for the snake being instantly killed the folds uncoiled
and the ship shot upward, only, instead of rising on an even keel,
the bow pointed toward the sky, while the stern was still fast to
the earth. Tilted at an angle of forty-five degrees the Black Hawk
was in a most peculiar position, and those standing on the deck
began to slide along it.

"There's another snake at the stern!" cried Mr. Damon as he grasped
a brace to prevent falling off. "Bless my slippers! it's the mate of
the one you killed! Shoot the other one, Tom!"

The young inventor needed no urging. Making his way as best he could
to the stern of the airship, he killed the second python, which was
even larger than the first, and in an instant the Black Hawk shot
upward, this time level, and as it should be. Things on board were
soon righted, and the travelers could stand upright. High above the
black jungle rose the craft, moving forward under the full power of
the propellers, until Tom rushed into the engine room, and reduced
speed.

"Well, talk about things happening!" exclaimed Ned, when they had
somewhat recovered from the excitement. "I should say they were
beginning with a vengeance!"

"That's the way in Africa," declared Mr. Durban. "It's a curious
country. Those pythons generally go in pairs, but it's the first
time I ever knew them to tackle an airship. They probably stay
around here where there is plenty of small game for them, and very
likely they mer