(1) I draw a second line, at the right-hand end of the 'received' entries, and at the left-hand end of the 'sent' entries. This I usually do pretty well 'up to date'. In my Register the first line is red, the second blue: here I distinguish them by making the first thin, and the second thick.
(2) Beginning with the last entry, and going backwards, I read over the names till I recognise one as having occurred already: I then link the two entries together, by giving the one, that comes first in chronological order, a 'foot-reference' (see Nos. 217, 225). I do not keep this 'up-to-date', but leave it till there are 4 or 5 pages to be done. I work back till I come among entries that are all supplied with 'foot-references', when I once more glance through the last few pages, to see if there are any entries not yet supplied with head-references: their prede-