After Doomsday: Some Details

I first read Robert Heinlein's Orphans Of The Sky, Poul Anderson's Guardians Of Time and After Doomsday and probably other works of sf in the yellow-jacketed Gollancz editions borrowed from the Public Library in Penrith, (scroll down) Cumberland, now Cumbria.

Continuing to reread After Doomsday:

for what Ramri looks like, see Avian Aliens;

Goldspring, whose role in the U.S.S. Benjamin Franklin had not been specified on his first appearance, turns out to be the detector officer;

the ship is protected by the standard sf prop of force screens;

the fact that the missiles that attack the ship are poorly programmed for their task is an important clue that whoever destroyed Earth is trying to frame someone else for the crime;

not only the population of Earth but also all other human beings in the Solar System, e.g., on the Moon, have been killed;

the novel is set forty-five to fifty years after the detonation of the first atomic bomb;

the Monwaingi discovered Earth twenty years ago, thus in the 1970s.