Chapman stopped them at the lock. "Remember to check your suits for leaks," he warned. "And check the valves of your oxygen tanks."
Donley looked sour. "I've gone out at least five hundred times," he said, "and you check me each time."
"And I'd check you five hundred more," Chapman said. "It takes only one mistake. And watch out for blisters under the pumice crust. You go through one of those and that's it, brother."
Donley sighed. "Chap, you watch us like an old mother hen. You see we check our suits, you settle our arguments, you see that we're not bored and that we stay healthy and happy. I think you'd blow our noses for us if we caught cold. But some day, Chap old man, you're gonna find out that your little boys can watch out for themselves!"
But he checked his suit for leaks and tested the valve of his tank before he left.
Only Klein and Chapman were left in the bunker. Klein was at the work table, carefully labeling some lichen specimens.
"I never knew you were married," Chapman said.