nts are seriously
injured by the box warping either inwards or outwards; in the one
case pressing too much on the instruments, and in the other, which
is worse, leaving them too much space, so that they shake about
whenever the box is carried. The consequence is that the screws
loosen, the glasses fall out of the telescopes, and the instruments
become unfit for use just when they are most wanted. I think these
evils may be avoided by having the parts of the box which touch any
instrument well padded with the most elastic materials, and for it
to be supported entirely on steel springs, strong enough to keep it
firmly in its place, and with sufficient play to allow the box to
warp without injury to any of the contents. I also wish an
improvement in the stand of the theodolite, which ought not to be
smaller than that of the five-inch one, and the joints made of the
metals least likely to sustain damage from friction. The cap-piece
should be nearly twice the depth, vertically, and cut out of one
solid piece of metal. I subjoin a sketch of it, with the
dimensions. It may be made of whatever metal you think proper.
There is no harm in having iron about it, because we seldom require
to use the needle. My reason for wanting this improvement is, that
the legs get loose so quickly from the wearing away of brass, and
that the many small surfaces in contact are too disproportionate to
their length. Strength and durability are of far more consequence
than lightness, as we have not the facilities for getting things
repaired here that you have in England. The figures I have placed
opposite to the instruments described are not supposed to be the
exact prices, but merely suggested as guides. I hope you will do
the best you can with the improvements mentioned, especially in the
mode of packing the larger articles. Please also to insure them to
the full value.

I have the honour to be,

Gentlemen,

Your obedient servant,

W.J. WILLS.

. . .

He then in a postscript makes some suggestions as to the
graduation of the scales. The instruments were sent out in the
shortest possible time and gave great satisfaction. On departing
for his last fatal expedition, he requested me, should he not
return, to give all his remaining instruments to his friend Mr.
Byerly, for whom his high estimation never abated. This injunction
I fulfilled as far as in my power. Any person who may happen to be
in charge of some that I had not, will I trust del