Mountains or elsewhere that you may select in the world.

If others attack, attack them, and quicker and harder than they can,
if such be a possibility. Should it ever be that you inherit the
Castle of Vissarion on the Spear of Ivan, remember that I had it
secretly fortified and armed against attack. There are not only
massive grilles, but doors of chilled bronze where such be needed.
My adherent Rooke, who has faithfully served me for nearly forty
years, and has gone on my behalf on many perilous expeditions, will,
I trust, serve you in the same way. Treat him well for my sake, if
not for your own. I have left him provision for a life of ease; but
he would rather take a part in dangerous enterprises. He is silent
as the grave and as bold as a lion. He knows every detail of the
fortification and of the secret means of defence. A word in your
ear--he was once a pirate. He was then in his extreme youth, and
long since changed his ways in this respect; but from this fact you
can understand his nature. You will find him useful should occasion
ever arise. Should you accept the conditions of my letter, you are
to make the Blue Mountains--in part, at least--your home, living
there a part of the year, if only for a week, as in England men of
many estates share the time amongst them. To this you are not bound,
and no one shall have power to compel you or interfere with you. I
only express a hope. But one thing I do more than hope--I desire, if
you will honour my wishes, that, come what may, you are to keep your
British nationality, unless by special arrangement with and consent
of the Privy Council. Such arrangement to be formally made by my
friend, Edward Bingham Trent, or whomsoever he may appoint by deed or
will to act in the matter, and made in such a way that no act save
that alone of Parliament in all its estates, and endorsed by the
King, may or can prevail against it.