If you want to teach someone a subject you do not know yourself, let
him measure the length of an object unknown to you, and he will
learn the measure you did not know before;--Master Giovanni da Lodi.

_XXI._

_Letters. Personal Records. Dated Notes._

_When we consider how superficial and imperfect are the accounts of
Leonardo's life written some time after his death by Vasari and
others, any notes or letters which can throw more light on his
personal circumstances cannot fail to be in the highest degree
interesting. The texts here given as Nos._ 1351--1353, _set his
residence in Rome in quite a new aspect; nay, the picture which
irresistibly dwells in our minds after reading these details of his
life in the Vatican, forms a striking contrast to the contemporary
life of Raphael at Rome._

_I have placed foremost of these documents the very remarkable
letters to the Defterdar of Syria. In these Leonardo speaks of
himself as having staid among the mountains of Armenia, and as the
biographies of the master tell nothing of any such distant journeys,
it would seem most obvious to treat this passage as fiction, and so
spare ourselves the onus of proof and discussion. But on close
examination no one can doubt that these documents, with the
accompanying sketches, are the work of Leonardo's own hand. Not
merely is the character of the handwriting his, but the spelling and
the language are his also. In one respect only does the writing
betray any marked deviation from the rest of the notes, especially
those treating on scientific questions; namely, in these
observations he seems to have taken particular pains to give the
most distinct and best form of expression to all he had to say; we
find erasures and emendations in almost every line. He proceeded, as
we shall see, in the same way in the sketches for letters to
Giuliano de' Medici, and what can be more natural, I may ask, than
to find the draft of a letter thus altered and improved when it is
to contain an account of a definite subject, and when personal
interests are in the scale? The finished copies as sent off are not
known to exist; if we had these instead of the rough drafts, we
might unhesitatingly have declared that some unknown Italian
engineer must have been, at that time, engaged in Armenia in the
service of the Egyptian Sultan, and that Leonardo had copied his
documents. Under this hypothesis however we should have to state
that this unknown writer must have been so far one in mind with
Leonardo as to use the same style of language and even the same
lines of thought. This explanation might--as I say--have been
possible, if only we had the finished letters. But why should these
rough drafts of letters be regarded as anything else than what they
actually and obviously are? If Leonardo had been a man of our own
time, we might perhaps have attempted to account for the facts by
saying that Leonardo, without having been in the East himself, might
have undertaken to write a Romance of which the scene was laid in
Armenia, and at the desire of his publisher had made sketches of
landscape to illustrate the text.

I feel bound to mention this singular hypothesis as it has actually
been put forward (see No. 1336 note 5); and it would certainly seem
as though there were no other possible way of evading the conclusion
to which these letters point, and their bearing on the life of the
master,--absurd as the alternative is. But, if, on a question of
such importance, we are justified in suggesting theories that have
no foundation in probability, I could suggest another which, as
compared with that of a Fiction by Leonardo, would be neither more
nor less plausible; it is, moreover the only other hypothesis,
perhaps, which can be devised to account for these passages, if it
were possible to prove that the interpretation that the documents
themselves suggest, must be rejected a priori; viz may not Leonardo
have written them with the intention of mystifying those who, after
his death, should try to decipher these manuscripts with a view to
publishing them? But if, in fact, no objection that will stand the
test of criticism can be brought against the simple and direct
interpretation of the words as they stand, we are bound to regard
Leonardo's travels in the East as an established fact. There is, I
believe nothing in what we know of his biography to negative such a
fact, especially as the details of his life for some few years are
wholly unknown; nor need we be at a loss for evidence which may
serve to explain--at any rate to some extent--the strangeness of his
undertaking such a journey. We have no information as to Leonardo's
history between 1482 and 1486; it cannot be proved that he was
either in Milan or in Florence. On the other hand the tenor of this
letter does not require us to assume a longer absence than a year or
two. For, even if his appointment_ (offitio) _as Engineer in Syria
had been a permanent one, it might have become untenable--by the
death perhaps of the Defterdar, his patron, or by his removal from
office--, and Leonardo on his return home may have kept silence on
the subject of an episode which probably had ended in failure and
disappointment.

From the text of No. 1379 we can hardly doubt that Leonardo intended
to make an excursion secretly from Rome to Naples, although so far
as has hitherto been known, his biographers never allude to it. In
another place (No. 1077) he says that he had worked as an Engineer
in Friuli. Are we to doubt this statement too, merely because no
biographer has hitherto given us any information on the matter? In
the geographical notes Leonardo frequently speaks of the East, and
though such passages afford no direct proof of his having been
there, they show beyond a doubt that, next to the Nile, the
Euphrates, the Tigris and the Taurus mountains had a special
interest in his eyes. As a still further proof of the futility of
the argument that there is nothing in his drawings to show that he
had travelled in the East, we find on Pl. CXX a study of oriental
heads of Armenian type,--though of course this may have been made in
Italy.

If the style of these letters were less sober, and the expressions
less strictly to the point throughout, it miglit be possible to
regard them as a romantic fiction instead of a narrative of fact.
Nay, we have only to compare them with such obviously fanciful
passages as No. 1354, Nos. 670-673, and the Fables and Prophecies.
It is unnecessary to discuss the subject any further here; such
explanations as the letter needs are given in the foot notes.

The drafts of letters to Lodovico il Moro are very remarkable.
Leonardo and this prince were certainly far less closely connected,
than has hitherto been supposed. It is impossible that Leonardo can
have remained so long in the service of this prince, because the
salary was good, as is commonly stated. On the contrary, it would
seem, that what kept him there, in spite of his sore need of the
money owed him by the prince, was the hope of some day being able to
carry out the project of casting the_ 'gran cavallo'.

Drafts of Letters and Reports referring to Armenia (1336. 1337).