I read the first of Ford’s stories in which a small group of men and women, ever hopeful of finding their Homeline, march through a narrow tube where hatches to alternate worlds and alternate times appear every 100 kilometers. I think that most of the Earthlike worlds have a corporation—Alternities, Inc.—which has tried to turn a profit on the tubes.

Warnke, a time traveler who has visited the moment of a past death more than once, comes to the house of Lady Amy Dudley née Robsart) on the eve that she is fated to fall down the stairs in an accident that her husband, Robert Dudley (an accused but reprieved conspirator in the taking of the English throne by Jane Grey) will be suspected of arranging so that he would be free to marry Elizabeth I.