Taking Adelaide as
the starting point, the course will be either along the present Port Road
between Hindmarsh and Bowden as far as section No. 407, thence along the
cross track between that section and section No. 419 (preliminary), as
far as the southeast corner of Mr. Mildred's section, No. 421; then in a
straight line through the last named section and Mr. Gilles's, No. 2072,
after leaving which it passes through an opening in the sand-hills, and
then winds along the highest ground between the creeks, leaving the South
Australian Company's road about a mile on the left, till it joins the
main road or street running through section G. at the North Arm; or
through North Adelaide and along the road at the back of Bowden, parallel
with the main Port Road as far as Mr. Torrens' residence, to the
south-east corner of Mr. Mildred's section, thence through that section
as before. The soil of the so-termed swamp, or rather marsh, is of the
most favourable description for embanking and draining operations,
consisting at the part of the line where the work has been commenced, of
a good loam for the first spit, and then clay to the depth of eighteen
inches or two feet, resting upon a stratum composed for the most part of
shells of numberless shapes and sizes, which extends to the bottoms of
the drains (four feet), being the level of high water at spring tides,
and at about the same above the low-water level.
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