 What made Captain Hannah want to give the narrator a black eye?
Captain Hannah climbed painfully down from the Delta Crucis , hobbled across the spaceport to where Beulah and I were waiting to greet him and hit me in the eye. I didn't ask Captain Hannah why he had socked me. Captain Hannah had lost the Look of Eagles. His eyes were swollen almost shut; every inch of him that showed was a red mass of welts piled on more welts, as though he had tangled with a hive of misanthropic bees. The gold-braided hat of his trade was not clamped in its usual belligerent position slightly over one eye. I only drink rhial when I've been exposed to Captain Hannah. He had foisted those two maudlin mastodons off onto me in one of our earlier deals, and if I had somehow been responsible for his present troubles, it was no more than he deserved. Transshipped seeds invariably failed to germinate, which explained its rarity. "When I left, marocca was growing like mad," said Captain Hannah. Bright sun most of the time—that means an almost cloudless environment. "Your tests were no good," agreed the captain with feeling. "I'll tell you about it first, and then I'll black your other eye," he decided. "You'll remember that I warned you that we should take some marocca out into space and solve any problems we might find before committing ourselves to hauling a full load of it?" asked Captain Hannah. If we had gone through all of that rigamarole, we would have lost the franchise. I almost asked him why he had been barricaded in the bathroom of the Delta Crucis , but I figured it was safer to let him tell me in his own way, in his own time. So I lined up the Delta Crucis perpendicular to her direction of motion, put a once-every-twenty-one hour spin on her to match the rotation rates of Mypore II and Gloryanna III, and uncovered the view ports to let in the light. It gradually brightened until 'noon time', with the ports pointing straight at the light source, and then dimmed until we had ten and one-half hours of darkness. "Oh," said Captain Hannah in quiet tones of controlled desperation, "it was very simple. And because somehow we had picked up half of the plants in the northern hemisphere of Mypore and the other half in the southern hemisphere, it turned out that half of the plants had a sinistral corkscrew and the other half had a dextral.
 Because Captain Hannah's transportation of the marocca plants was frustrating and gruesome.
 Because the narrator offered no help in transporting the marocca plants.  Because the welts on Captain Hannah were angering the captain.  Because the narrator made an unfair deal to transport the plants to Gloryanna III.  Because Captain Hannah's transportation of the marocca plants was frustrating and gruesome.