The Planet Mappers

As he heard that dread yet telltale spang against the hull of their spaceboat, young Jon Carver dropped his reelbook and sprang to his feet. His eyes looked swiftly to help his ears trace the sudden hiss he knew was their precious air escaping. In the back of his mind he heard the sudden grunt his father made, the sound of a falling body, his mother's frightened scream, and his brother's "What's wrong?" But he did not stop his own lanky, gangling body in its leap toward the outer bulkhead. And as he jumped, he pulled his handkerchief from his hip pocket.