"Oh, yes--Bossuet only knew it was a factor because he had a half-memory of you telling him so. These other selves...they could come and go, read everything and compare different universes..."

Combeferre pulls himself up short before he disappears into a world of envious speculation. "We could certainly leave notes. Our most detailed accounts of the events between 1830 and 1832, left with Bar, could save our other selves time and trouble. They would have everything we consider relevant, which would be very similar to what's relevant to them, at their fingertips. They wouldn't have to search the depths of the Library for pertinent facts."