I have taken, since you went away, many of the walks which we have taken
together; and none of them, I believe, without thoughts of you. I have,
though not a good memory in general, yet a good local memory, and can
recollect, by the help of a tree or a stile, what you said on that
particular spot. For this reason I purpose, when the summer is come, to
walk with a book in my pocket; what I read at my fireside I forget, but
what I read under a hedge or at the side of a pond, that pond and that
hedge will always bring to remembrance; and this is a sort of _memoria
technica_ which I would recommend to you, if I did not know that you
have no occasion for it.