Music is quicksilver, gossamer; careers are measured in butterfly lifetimes.

In her previous novels, Maggie O'Farrell has often measured the distance between intimates and the unexpected intimacy of distance - geographic, temporal, cultural. In 'The Hand That First Held Mine' and 'The Distance Between Us,' characters separated by many miles or many years turn out to be joined in ways they never anticipated.

In each medium - popular music, literature, and visual art, respectively - the woman has broken form, shed a skin, with each phase of her career, whereas the man has returned to ever-deepening iterations of the sound or sentence or imagery with which he began.

Emotional grandeur, rendered in the vernacular, has been Mona Simpson's forte. In her novels, 'Anywhere but Here,' 'The Lost Father' and 'A Regular Guy,' Simpson wrote wide and long and high about the most profound human bonds: parents and children lost each other, found each other, lost each other again, but differently.

The railroads needed standardized time; as a result, the technology of train travel shaped the way everyone gets up, eats, goes to sleep, calculates age, and, perhaps of no small importance, imagine the world as a whole, ticking reliably, with reliable deviations, according to the beat of one central clock in a physical location.

If we are indeed nostalgic for the weight of clock time, it is worth remembering that the standardized time that most of us know has only been around since the mid-nineteenth century. It was invented for the railroads.