My friend, into whose hands I hope that all these manuscripts of mine will pass one day, of this one I have something to say to you. A long while ago I jotted down in it the history of the events that it details with more or less completeness. This I did for my own satisfaction. You will have noted how memory fails us as we advance in years; we recollect, with an almost painful exactitude, what we experienced and saw in our youth, but the happenings of our middle life slip away from us or become blurred, like a stretch of low-lying landscape overflowed by grey and nebulous mist.