The Fifth-Dimension Tube by Murray Leinster

A huge ornithopter came heavily out on the landing stage in the city of Rahn. Its crew took their places. With a creaking and rattling noise it rose toward the invading fleet. From its filigree cockpit sides, men waved green branches. A green light wavered from the big plane that carried the bearded Council man and Denham. That plane swept forward and hovered above the ornithopter. The two flying things seemed almost fastened together, so closely did their pilots maintain that same speed and course. A snaky rope went coiling down into the lower ship's cockpit. A burly figure began to climb it hand over hand. A second figure followed. A third figure, in the drab clothing that distinguished Jacaro's men from all others, wrapped the rope about himself and was hauled up bodily. And Tommy had seen Jacaro but once, yet he was suddenly grimly convinced that this was Jacaro himself.

The two planes swept apart. The ornithopter descended toward the landing stage of Rahn. The freight plane swept toward the ship that carried Tommy. Again the snaky rope coiled down. And Tommy swung up the fifteen feet that alone separated the two soaring planes, and looked into the hard, amused eyes of Jacaro where he sat between two other emissaries of Rahn. One of them was half naked and savage, with the light of madness in his eyes. A Ragged Man. The other was lean and desperate, despite the colored tunic of a civilized man that he wore.