Cantonments we are not only to seek Villages removed from
marshy Grounds, but such as are least choaked with
Plantations, and stand highest above subterraneous Water. See
his _Observat. on Diseases of the Army_, 3d edit. p. 99.

When Necessity obliges Commanders to take Post, or encamp in a wet or
marshy Ground, they should endeavour to make it as dry as possible, by
ordering Trenches to be cut for Drains across the Field and round the
Mens Tents; to see that the Ground within the Tents be well covered
with Straw; to order the Tents to be struck at Mid-Day, in dry warm
Weather, and the Men to dry and air the Straw, and change it
frequently; to have a proper Supply of Blankets for the Men, and to
take Care that they be well cloathed, especially those who go upon
Duty in the Nights; and, in the northern Climates, to have Fires in
proper Places for warming the Men and drying their Cloaths, and for
correcting the Dampness of the Air[138].

[138] The Negroes on the Coast of _Guinea_, and some of the
_Indians_, both of whom sleep on the Ground, have constantly
a Fire producing a little Smoak burning in the Hutts where
they sleep, which corrects the Moisture of the Night, and
renders the Damp of the Earth less noxious; and during the
Time of the very unwholesome Fogs on the Coast of _Guinea_,
called Harmattans, which lay waste whole Negroe Towns, the
Smoak of Wood, of pitched Staves, and such Things, are found
to be the best Correctors of this thick Air. See Dr. _Lind's
Means of preserving the Health of Seamen_.

In Countries lying under the Torrid Zone, the Parts near the Sea Shore
are often marshy, or close and covered with Wood, or have swampy
Beaches, and are very unwholesome; and therefore where Soldiers aboard
of Transports keep their Health, Commanders ought to be very careful
not to allow them to land, till they come to the Place of their
Destination. Dr. _Lind_ observes, that Men commonly live more healthy
in warm Climates at Sea, where the Air is dry and serene, and the Heat
moderated by refreshing Breezes, than when they arrive in Harbours, or
get within Reach of the noxious Vapours which arise from many Parts of
the Land[139].

[139] Dr. _Lind_ says, that it is constantly observed in
unhealthy Harbours, that the Boats Crews employed in wooding
and watering the Ships, who are obliged to lie on Shore,
suffer most. _Ibid._ p. 72.

When Nece