[Footnote: The numerous corrections, the alterations in the figures
(l. 18) and the absence of any signature prove that this is merely
the rough draft of a letter to Lodovico il Moro. It is one of the
very few manuscripts which are written from left to right--see the
facsimile of the beginning as here reproduced. This is probably the
final sketch of a document the clean of which copy was written in
the usual manner. Leonardo no doubt very rarely wrote so, and this
is probably the reason of the conspicuous dissimilarity in the
handwriting, when he did. (Compare Pl. XXXVIII.) It is noteworthy
too that here the orthography and abbreviations are also
exceptional. But such superficial peculiarities are not enough to
stamp the document as altogether spurious. It is neither a forgery
nor the production of any artist but Leonardo himself. As to this
point the contents leave us no doubt as to its authenticity,
particularly l. 32 (see No. 719, where this passage is repeated).
But whether the fragment, as we here see it, was written from
Leonardo's dictation--a theory favoured by the orthography, the
erasures and corrections--or whether it may be a copy made for or by
Melzi or Mazenta is comparatively unimportant. There are in the
Codex Atlanticus a few other documents not written by Leonardo
himself, but the notes in his own hand found on the reverse pages of
these leaves amply prove that they were certainly in Leonardo's
possession. This mark of ownership is wanting to the text in
question, but the compilers of the Codex Atlanticus, at any rate,
accepted it as a genuine document.

With regard to the probable date of this projected letter see Vol.
II, p. 3.]

Most illustrious Lord, Having now sufficiently considered the
specimens of all those who proclaim themselves skilled contrivers of
instruments of war, and that the invention and operation of the said
instruments are nothing different to those in common use: I shall
endeavour, without prejudice to any one else, to explain myself to
your Excellency showing your Lordship my secrets, and then offering
them to your best pleasure and approbation to work with effect at
opportune moments as well as all those things which, in part, shall
be briefly noted below.

1) I have a sort of extremely light and strong bridges, adapted to
be most easily carried, and with them you may pursue, and at any
time flee from the enemy; and others, secure and indestructible by
fire and battle, easy and convenient to lift and place. Also methods
of burning and destroying those of the enemy.

2) I know how, when a place is besieged, to take the water out of
the trenches, and make endless variety of bridges, and covered ways
and ladders, and other machines pertaining to such expeditions.

3) Item. If, by reason of the height of the banks, or the strength
of the place and its position, it is impossible, when besieging a
place, to avail oneself of the plan of bombardment, I have methods
for destroying every rock or other fortress, even if it were founded
on a rock, &c.

4) Again I have kinds of mortars; most convenient and easy to carry;
and with these can fling small stones almost resembling a storm; and
with the smoke of these causing great terror to the enemy, to his
great detriment and confusion.

9) [8] And when the fight should be at sea I have kinds of many
machines most efficient for offence and defence; and vessels which
will resist the attack of the largest guns and powder and fumes.

5) Item. I have means by secret and tortuous mines and ways, made
without noise to reach a designated [spot], even if it were needed
to pass under a trench or a river.

6) Item. I will make covered chariots, safe and unattackable which,
entering among the enemy with their artillery, there is no body of
men so great but they would break them. And behind these, infantry
could follow quite unhurt and without any hindrance.

7) Item. In case of need I will make big guns, mortars and light
ordnance of fine and useful forms, out of the common type.

8) Where the operation of bombardment should fail, I would contrive
catapults, mangonels, _trabocchi_ and other machines of marvellous
efficacy and not in common use. And in short, according to the
variety of cases, I can contrive various and endless means of
offence and defence.

10) In time of peace I believe I can give perfect satisfaction and
to the equal of any other in architecture and the composition of
buildings public and private; and in guiding water from one place to
another.

Item: I can carry out sculpture in marble, bronze or clay, and also
in painting whatever may be done, and as well as any other, be he
whom he may.

[32] Again, the bronze horse may be taken in hand, which is to be to
the immortal glory and eternal honour of the prince your father of
happy memory, and of the illustrious house of Sforza.

And if any one of the above-named things seem to any one to be
impossible or not feasible, I am most ready to make the experiment
in your park, or in whatever place may please your Excellency--to
whom I commend myself with the utmost humility &c.