The relevant provisions of the South Australian Act, No. 11 of
1870, may be briefly stated. By this Act, the Governor (of South
Australia) in Council was empowered to make an agreement for the
construction and maintenance of an electric telegraph line from Port
Augusta to Port Darwin (Port Darwin was at the time within the
"Province " of South Australia), and for the junction thereof with
a telegraph line to Europe. Then, by an agreement dated 29th
August 1870, the Governor in Council agreed that the British Austra-
lian Telegraph Co. (the appellant Company is assignee from the British
company) might lay down the land end of a submarine cable at Port
Darwin and take possession of Jand not exceeding six acres for the
purpose. Art. 3 of this agreement provides as follows: "So long as
the land so to be taken, or to be taken under art. 12 of this agreement"
(art. 12 need not concern us), "and the cable station," &c.,
" shall be used exclusively for the purposes of telegraphic communica-
tion with Europe and other places, the same premises, and the under-
taking, property and profits of the Company shall be exempt from all
provincial, local, and other taxes, rates, charges, and assessments within
the said Province, whether now existing or chargeable, or hereafter to
be charged, imposed, or created ; and every legislative and other act,
by virtue of which any tax, rate, charge, or assessment might
otherwise be imposed upon or in respect of the said premises, or any of
them, shall contain an express ecemption of the premises from charges
thereby created or authorized."