ed at any lithographer's:--

No. 1. pocket Memorandum Book, measuring three inches and a half by five,
made of strong paper. (Captain Blakston did not use, and I should not
advise travellers to use, "prepared" paper, for it soon becomes rotten,
and the leaves fall out; besides that, wet makes the paper soppy.) The
books are paged with bold numbers printed in the corners; two faint red
lines are ruled down the middle of each page, half an inch apart, to
enable the book to be used as a field-surveyor's book when required. In
this pocket=book, every single thing that is recorded at all, is
originally recorded with a hard HHH pencil. Everything is written
consecutively, without confusion or attempt to save space. There may
easily be 150 pages in each of these books; and a sufficient number
should be procured to admit of having at least one per month. Do not
stint yourself in these.

No. 2. Log-Book.--This is an orderly way of collecting such parts of the
surveying material as has been scattered over each day in your note-book.
It is to be neatly written out, and will become the standard of future
reference. By using a printed form, the labour of drawing up the log on
the one hand, and that of consulting it on the other, will be vastly
diminished. I give Captain Blakiston's form, in pages 28, 29, and I would
urge intending travellers not to depart from it without very valid
reasons, for it is the result of considerable care and experience. The
size in which the form is printed here is not quite accurate, because the
pages of this book are not large enough to admit of it, but the
proportion is kept. The actual size is intended to be five and a half
inches high and nine inches wide, so that it should open freely along one
of the narrow sides of the page, in the way that all memoranda books
ought to open. Four pages go to a day; of these the pages 1 and 2 are
alone represented in this book, pages 3 and 4 being intended to be left
blank.

[P 28 and p 29 show samples of the log book pages being described].

The bold figures 17 and 18 in the right-hand corners of the form I give,
show how the pages should be numbered. The lines in p. 18 should be faint
blue.

No. 3. Calculation Book.--This should be of the same size and shape as
the Log Book, and should contain outline forms for calculations. The
labour and confusion saved by using these, and the accuracy of work that
they ensure, are truly remarkable. The instruments used,