Far above and just emerging from the haze of the distance was a tiny speck. "Quick!" exclaimed Tar-gash. "It is a thipdar," and motioning Tarzan to follow him he ran swiftly to concealment beneath a large tree.
"What is a thipdar?" asked Tarzan, as the two halted beneath the friendly shade.
"A thipdar," said the Sagoth, "is a thipdar;" nor could he describe it more fully other than to add that the thipdars were sometimes used by the Mahars either to protect them or to hunt their food.
"Is the thipdar a living thing?" demanded Tarzan.
"Yes," replied Tar-gash. "It lives and is very strong and very fierce."
"Then that is not a thipdar," said Tarzan.
"What is it then?" demanded the Sagoth.
"It is an aeroplane," replied Tarzan.
"What is that?" inquired the Sagoth.
"It would be hard to explain it to you," replied the ape-man. "It is something that the men of my world build and in which they fly through the air," and as he spoke he stepped out into the opening, where he might signal the pilot of the plane, which he was positive was the one carried by the O-220 and which, he assumed, was prosecuting a search for him.