Page:A Voyage to Terra Australis Volume 1.djvu/202

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clxxx
INTRODUCTION.
[Prior Discoveries.

Flinders
and Bass
1798.

bearings of Maatsuyker's Isles and the different headlands, we bore away eastward, and passed another deep, sandy bight, probably the same in which Mr. Cox anchored in 1789. At two o'clock, the

South-west Cape, distant 15 or 16 miles, bore
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W.  2° S.
A steep head at the furthest extreme, which proved to be the South Cape,
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S. 72 E[1]

At this time we were one mile within, or north of the largest of the islands; and saw with some surprise, for it is three miles from the main, that its grassy vegetation had been burnt. From hence we steered for the easternmost isle, lying off a wide open bight in the coast, and afterwards hauled up for the South Cape. The wind died away at six o'clock, when the Cape was one mile distant; but thick clouds were gathering in the south and west, and strong gusts with heavy rain presently succeeded. Fortunately, the squalls came from the westward, so that we were enabled to get further from those stupendous cliffs; had they come from the south, the consequences might have been fatal to the Norfolk.

The first steep head, to the eastward of the South Cape, opened
  1. The magnetic bearing of the South-west Cape was W. 5° S., and that of the South Cape E. 15° S. The true variation I believe to have been 8° E.; but as the sloop's head was at east, no more than 3° are allowed, from a system which will be hereafter explained. It seemed necessary to say this, because the formation of the south end of Van Diemen's Land in my chart, differs from that given by captain Cook, and from those of most others.

    In Bayly's Astronomical Observations, page 192, it appears that six sets of variations were observed on board the Resolution, Mar. 24, 1777, off the South Cape; the mean result of which was 4° 43′ east. Next morning six other sets were taken near the same place, and the mean variation came out 10° 8′ east. In captain King's journal, I found the same observations entered, and that the ship's head was E. by N. ½ N. in the first case, and N.W. by W. in the second. This, with the example in the Francis, page cxxvi, and that in the Norfolk on the preceding page, may serve to show, for the present, that corrections are required to the variation, according to the direction of the vessel's head.